atmel-samd: Ensure MTB is off in case we ran a debug build before a non-debug build.
atmel-samd: Ensure MTB is off in case we ran a debug build before
a non-debug build.

adafruit/micropython,adafruit/micropython,adafruit/circuitpython,adafruit/circuitpython,adafruit/micropython,adafruit/circuitpython,adafruit/circuitpython,adafruit/circuitpython,adafruit/micropython,adafruit/circuitpython,adafruit/micropython