STM: HAL: Add a restricted peripherals list

Add the STDIO_UART peripheral to pinmap_restricted_peripherals().
This peripheral cannot be tested as it is essential for the greentea
communication.
This patch is for ST only; other target families may use the same value
for different types of peripherals, e.g. UART_0 == I2C_0 == SPI_0.

Rename pinmap.c to pinmap.cpp to overcome a C restriction of constant
array initializer elements only.

Author: Filip Jagodzinski

targets/TARGET_STM/pinmap.c renamed to targets/TARGET_STM/pinmap.cpp

@@ -32,8 +32,9 @@
 #include "PortNames.h"
 #include "mbed_error.h"
 #include "pin_device.h"
+#include "PeripheralPins.h"
 
-extern GPIO_TypeDef *Set_GPIO_Clock(uint32_t port_idx);
+extern "C" GPIO_TypeDef *Set_GPIO_Clock(uint32_t port_idx);
 
 const uint32_t ll_pin_defines[16] = {
     LL_GPIO_PIN_0,
@@ -197,3 +198,27 @@ void pin_mode(PinName pin, PinMode mode)
     LL_HSEM_ReleaseLock(HSEM, CFG_HW_GPIO_SEMID, HSEM_CR_COREID_CURRENT);
 #endif /* DUAL_CORE */
 }
+
+/**
+ * List of peripherals excluded from testing
+ */
+const PeripheralList *pinmap_restricted_peripherals()
+{
+#if DEVICE_SERIAL
+    static const int stdio_uart = pinmap_peripheral(STDIO_UART_TX, PinMap_UART_TX);
+    static const int peripherals[] = {
+        stdio_uart
+    };
+    static const PeripheralList peripheral_list = {
+        sizeof peripherals / sizeof peripherals[0],
+        peripherals
+    };
+    return &peripheral_list;
+#else
+    static const PeripheralList peripheral_list = {
+        0,
+        0
+    };
+    return &peripheral_list;
+#endif
+}