STM32 : Add USB used pins in PinNames.h files

[jeromecoutant]

Description

Goal is to help users to know which pins are used when USB feature is enabled

Status

READY

[0xc0170]

@jeromecoutant Can you please look at travis failure?

Executing: python tools/build.py -m NUCLEO_F042K6 -t GCC_ARM -j 4 -c --silent --dsp
In file included from /home/travis/build/ARMmbed/mbed-os/BUILD/mbed/hal/pinmap.h:22:0,
                 from /home/travis/build/ARMmbed/mbed-os/BUILD/mbed/TARGET_NUCLEO_F042K6/TARGET_STM/PeripheralPins.h:34,
                 from /home/travis/build/ARMmbed/mbed-os/targets/TARGET_STM/TARGET_STM32F0/TARGET_NUCLEO_F042K6/PeripheralPins.c:31:
/home/travis/build/ARMmbed/mbed-os/BUILD/mbed/TARGET_NUCLEO_F042K6/TARGET_STM/TARGET_STM32F0/TARGET_NUCLEO_F042K6/PinNames.h:121:5: error: redeclaration of enumerator 'USB_NOE_ALT'
     USB_NOE_ALT = PA_15,
     ^
/home/travis/build/ARMmbed/mbed-os/BUILD/mbed/TARGET_NUCLEO_F042K6/TARGET_STM/TARGET_STM32F0/TARGET_NUCLEO_F042K6/PinNames.h:120:5: note: previous definition of 'USB_NOE_ALT' was here
     USB_NOE_ALT = PA_13,

[jeromecoutant]

Hi
Error is corrected.
I rebased files in the same time.

[0xc0170]

/morph test

[mbed-bot]

Result: SUCCESS

Your command has finished executing! Here's what you wrote!

/morph test

Output

mbed Build Number: 611

All builds and test passed!

[adbridge]

LGTM