bare-arm/mpconfigport.h: Use MICROPY_CONFIG_ROM_LEVEL_MINIMUM.
bare-arm/mpconfigport.h: Use MICROPY_CONFIG_ROM_LEVEL_MINIMUM.

To simplify the config.  This commit does not change the build.

Signed-off-by: Damien George <99e6b749acbfbe2a596df99e91d24d6e1fdbee00@micropython.org>

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