stm32/boards/NUCLEO_WB55: Enable LPUART1 on PA2/PA3.
stm32/boards/NUCLEO_WB55: Enable LPUART1 on PA2/PA3.

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

pfalcon/micropython,pfalcon/micropython,pfalcon/micropython,pfalcon/micropython,pfalcon/micropython