stm32/boards/PYBD_SF2: Disable GCC 11 warnings for array bounds.
stm32/boards/PYBD_SF2: Disable GCC 11 warnings for array bounds.

With GCC 11 there is now a warning about array bounds of OTP-mac, due to
the OTP being a literal address.

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

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