Adding Murata WSM-BL241 as new target

[ashok-rao]

Description

Adding Murata WSM-BL241 as a new MTB target.

Pull request type

[ ] Fix
[ ] Refactor
[x] Target update
[ ] Functionality change
[ ] Docs update
[ ] Test update
[ ] Breaking change

This is a new MTB target based on nRF52832.

Greentea logs attached below. There is only 1 LED brought out on the board. Does the other 2 LED's need to be defined (& ==NC) for greentea / CI ? @0xc0170 @cmonr can you please let me know?

BL241_GT_Log_ARMCC_Pass.txt
BL241_GT_Log_GCC_Pass.txt
BL241_GT_Log_IAR_Pass.txt

[cmonr]

@ashok-rao I think LED2 should be marked as NC.
IIrc, there's a test that blinks two leds, not just one, and we've had a new target fail testing because it didn't have that definiition 😄

[ashok-rao]

Thanks @cmonr , done in the latest commit.

[0xc0170]

Small change request

[0xc0170]

Can you fix the year (2018) ? And also add SPDX identifier right below

/*
 * Copyright (c) 2018, Arm Limited and affiliates.
 * SPDX-License-Identifier: Apache-2.0

[ashok-rao]

Thanks @0xc0170 .. Done in latest commit.

[cmonr]

/morph build

[mbed-ci]

Build : SUCCESS

Build number : 3658
Build artifacts/logs : http://mbed-os.s3-website-eu-west-1.amazonaws.com/?prefix=builds/8756/

Triggering tests

/morph test
/morph export-build
/morph mbed2-build

[mbed-ci]

Exporter Build : SUCCESS

Build number : 3265
Build artifacts/logs : http://mbed-os.s3-website-eu-west-1.amazonaws.com/?prefix=builds/exporter/8756/

[0xc0170]

Info: This PR has been re-bundled into a new rollup PR (#8800).

No further work is needed here, as once that PR is merged, this PR will also be closed and marked as merged.
If any more commits are made in this PR, this PR will remain open and have to go through CI on its own.

[cmonr]

Starting CI

[mbed-ci]

Test run: SUCCESS

Summary: 4 of 4 test jobs passed
Build number : 3
Build artifacts
Build logs