stm32/boards/NUCLEO_F091RC: Add Arduino-named pins and rename CPU pins.
stm32/boards/NUCLEO_F091RC: Add Arduino-named pins and rename CPU pins.

To match pin labels on other NUCLEO 64 boards.

pfalcon/micropython,swegener/micropython,bvernoux/micropython,selste/micropython,henriknelson/micropython,bvernoux/micropython,pfalcon/micropython,swegener/micropython,swegener/micropython,pozetroninc/micropython,MrSurly/micropython,tobbad/micropython,bvernoux/micropython,tralamazza/micropython,henriknelson/micropython,pramasoul/micropython,adafruit/circuitpython,MrSurly/micropython,selste/micropython,swegener/micropython,kerneltask/micropython,tobbad/micropython,henriknelson/micropython,adafruit/circuitpython,adafruit/micropython,selste/micropython,pfalcon/micropython,MrSurly/micropython,kerneltask/micropython,kerneltask/micropython,swegener/micropython,pozetroninc/micropython,adafruit/micropython,henriknelson/micropython,MrSurly/micropython,tralamazza/micropython,pozetroninc/micropython,bvernoux/micropython,adafruit/circuitpython,tralamazza/micropython,kerneltask/micropython,pfalcon/micropython,adafruit/micropython,trezor/micropython,pramasoul/micropython,adafruit/circuitpython,bvernoux/micropython,pramasoul/micropython,adafruit/circuitpython,trezor/micropython,MrSurly/micropython,tobbad/micropython,tobbad/micropython,selste/micropython,pramasoul/micropython,adafruit/micropython,pozetroninc/micropython,henriknelson/micropython,kerneltask/micropython,adafruit/micropython,tobbad/micropython,trezor/micropython,adafruit/circuitpython,trezor/micropython,pramasoul/micropython,selste/micropython,pfalcon/micropython,tralamazza/micropython,pozetroninc/micropython,trezor/micropython