Implement endpoint_abort for STM32
Implement endpoint_abort for STM32

Make use of the added function HAL_PCD_EP_Abort to implement
endpoint_abort.

andcor02/mbed-os,andcor02/mbed-os,andcor02/mbed-os,mbedmicro/mbed,andcor02/mbed-os,andcor02/mbed-os,mbedmicro/mbed,mbedmicro/mbed,mbedmicro/mbed,andcor02/mbed-os,mbedmicro/mbed,kjbracey-arm/mbed,kjbracey-arm/mbed,kjbracey-arm/mbed,kjbracey-arm/mbed