Upgrade NRF52 BLE API to version 5

* Add NRF_SD_BLE_API_VERSION=5 macro to MCU_NRF52832 target
* Added initial Softdevice v5 API support for nRF5XPalGattClient.cpp
* Added initial Softdevice v5 API support for nRF5xGap.h
* Added initial Softdevice v5 API support for nRF5xGattServer.cpp
* Make sure the ah() hash function used by the security manager is declared with C linkage
* Removed 'ARM porting pending' checks in Nordic SDK
* Added BLE configuration to mbed_lib.json for NRF52x targets
* Migrated APIs and events model for Nordic SDK14.2 & SD API v5 in btle.cpp; adopted polling dispatch model
* Migrated APIs and events model for Nordic SDK14.2 & SD API v5 in nRF5xn.cpp
* Migrated APIs and events model for Nordic SDK14.2 & SD API v5 in nRF5xGap.cpp
* Added const qualifier to hwCallbacks's p_ble_evt parameter in nRF5xGattServer
* Add workaround to enable Radio Notification module from Nordic SDK
  * Disabled SWI1 interrupt manually from SWI driver module
    * Added missing include directive for "nrf_nvic.h" in ble_radio_notification.c
* Set correct number of custom UUIDs
* Adjust Softdevice RAM requirements for NRF52832/S132
  * RAM settings for the application were adjusted as follow:
    * Start: 0x20003800
    * Size: 0xC800
* Adjust Softdevice RAM requirements for NRF52840/S140
  * RAM settings for the application were adjusted as follow:
    * Start: 0x20003700 (was 0x20003000)
    * Size: 0xC900
* Added 3dBm as a permitted TX Power value for NRF52832
* Fix address type recovery in GAP
* Return min non-connectable adv interval compatible with infrastrcture's expectations
* Moved BLE driver from TARGET_SDK_14_2/FEATURE_BLE to TARGET_SDK_14_2/TARGET_SOFTDEVICE_COMMON/ble

Author: Donatien Garnier

features/FEATURE_BLE/targets/TARGET_NORDIC/TARGET_NRF5x/CHANGELOG.md

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+This module contains softdevice which comes with The Nordic Softdevice License Agreement,
+a BSD-like licence for binary distributions, offered by Nordic for use in mbed. Some
+other files come from the mbed SDK, and are licensed under Apache-2.0. Unless
+specifically indicated otherwise in a file, files are licensed under the
+Apache 2.0 license, as can be found in: apache-2.0.txt. The Nordic Semiconductor Softdevice
+License Agreement can be found in softdevice_nrf51822_licence_agreement.txt.

features/FEATURE_BLE/targets/TARGET_NORDIC/TARGET_NRF5x/LICENSE

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+Copyright (c) 2015 ARM Limited
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.

features/FEATURE_BLE/targets/TARGET_NORDIC/TARGET_NRF5x/apache-2.0.txt

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+{
+  "name": "ble-nrf51822",
+  "version": "2.7.1",
+  "description": "Nordic stack and drivers for the mbed BLE API.",
+  "keywords": [
+    "Bluetooth",
+    "BLE",
+    "mbed",
+    "mbed-official"
+  ],
+  "author": "Rohit Grover",
+  "repository": {
+    "url": "[email protected]:ARMmbed/ble-nRF51822.git",
+    "type": "git"
+  },
+  "homepage": "https://developer.mbed.org/teams/Nordic-Semiconductor/",
+  "licenses": [
+    {
+      "url": "https://spdx.org/licenses/Apache-2.0",
+      "type": "Apache-2.0"
+    },
+    {
+      "type": "LicenseRef-softdevice_nrf51822_licence_agreement.txt"
+    }
+  ],
+  "dependencies": {
+    "ble": "^2.6.0",
+    "nrf51-sdk": "^2.4.0"
+  },
+  "extraIncludes": [
+    "source/btle",
+    "source/btle/custom",
+    "source/common"
+  ],
+  "targetDependencies": {}
+}

features/FEATURE_BLE/targets/TARGET_NORDIC/TARGET_NRF5x/module.json

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+/*
+ * S110/S120/S130 License Agreement
+ *
+ * Copyright (c) 2015, Nordic Semiconductor ASA, All rights reserved.
+ *
+ * Redistribution. Redistribution and use in binary form, without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * • Redistributions must reproduce the above copyright notice and the following
+ *   disclaimer in the documentation and/or other materials provided with the
+ *   distribution.
+ * • Neither the name of the copyright holder nor the names of its contributors
+ *   may be used to endorse or promote products derived from this software
+ *   without specific prior written permission.
+ * • No reverse engineering, decompilation, or disassembly of this software is
+ *   permitted.
+ *
+ * DISCLAIMER.
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * /