stm32/main: Peform a clean shutdown of btstack on soft reset.
stm32/main: Peform a clean shutdown of btstack on soft reset.

Not just NimBLE.

tobbad/micropython,pramasoul/micropython,bvernoux/micropython,selste/micropython,bvernoux/micropython,tobbad/micropython,adafruit/circuitpython,henriknelson/micropython,adafruit/circuitpython,MrSurly/micropython,MrSurly/micropython,bvernoux/micropython,selste/micropython,MrSurly/micropython,henriknelson/micropython,henriknelson/micropython,adafruit/circuitpython,tobbad/micropython,bvernoux/micropython,henriknelson/micropython,kerneltask/micropython,MrSurly/micropython,pramasoul/micropython,adafruit/circuitpython,kerneltask/micropython,MrSurly/micropython,pramasoul/micropython,tobbad/micropython,bvernoux/micropython,kerneltask/micropython,adafruit/circuitpython,adafruit/circuitpython,selste/micropython,henriknelson/micropython,selste/micropython,pramasoul/micropython,kerneltask/micropython,pramasoul/micropython,tobbad/micropython,selste/micropython,kerneltask/micropython