stm32/mpconfigport.h: Add MICROPY_THREAD_YIELD() macro.
stm32/mpconfigport.h: Add MICROPY_THREAD_YIELD() macro.

pfalcon/micropython,swegener/micropython,micropython/micropython-esp32,micropython/micropython-esp32,micropython/micropython-esp32,blazewicz/micropython,pramasoul/micropython,henriknelson/micropython,tralamazza/micropython,ryannathans/micropython,pozetroninc/micropython,kerneltask/micropython,MrSurly/micropython,kerneltask/micropython,MrSurly/micropython-esp32,selste/micropython,AriZuu/micropython,kerneltask/micropython,henriknelson/micropython,infinnovation/micropython,MrSurly/micropython-esp32,swegener/micropython,adafruit/circuitpython,tobbad/micropython,trezor/micropython,henriknelson/micropython,adafruit/circuitpython,lowRISC/micropython,adafruit/micropython,pramasoul/micropython,lowRISC/micropython,trezor/micropython,bvernoux/micropython,lowRISC/micropython,tobbad/micropython,ryannathans/micropython,micropython/micropython-esp32,adafruit/micropython,bvernoux/micropython,adafruit/micropython,AriZuu/micropython,tobbad/micropython,dmazzella/micropython,AriZuu/micropython,micropython/micropython-esp32,tralamazza/micropython,lowRISC/micropython,torwag/micropython,swegener/micropython,pfalcon/micropython,ryannathans/micropython,adafruit/circuitpython,MrSurly/micropython,bvernoux/micropython,tobbad/micropython,torwag/micropython,MrSurly/micropython-esp32,dmazzella/micropython,pozetroninc/micropython,infinnovation/micropython,dmazzella/micropython,swegener/micropython,bvernoux/micropython,pozetroninc/micropython,infinnovation/micropython,blazewicz/micropython,adafruit/micropython,dmazzella/micropython,MrSurly/micropython-esp32,MrSurly/micropython,kerneltask/micropython,adafruit/circuitpython,pozetroninc/micropython,torwag/micropython,trezor/micropython,adafruit/circuitpython,infinnovation/micropython,selste/micropython,kerneltask/micropython,henriknelson/micropython,pramasoul/micropython,pramasoul/micropython,tobbad/micropython,selste/micropython,MrSurly/micropython,blazewicz/micropython,adafruit/circuitpython,henriknelson/micropython,pfalcon/micropython,pramasoul/micropython,blazewicz/micropython,swegener/micropython,blazewicz/micropython,torwag/micropython,pozetroninc/micropython,trezor/micropython,AriZuu/micropython,AriZuu/micropython,pfalcon/micropython,trezor/micropython,pfalcon/micropython,MrSurly/micropython-esp32,MrSurly/micropython,adafruit/micropython,selste/micropython,ryannathans/micropython,tralamazza/micropython,infinnovation/micropython,bvernoux/micropython,tralamazza/micropython,lowRISC/micropython,ryannathans/micropython,torwag/micropython,selste/micropython