drivers: sx126x: add support for the stm32wl chip

Add support for the STM32WL integrated radio, based on the sx1262. The
STM32WL implementation does not use any GPIO, and the signals are routed
to other units of the SoC and accessed with the ST HAL.

Signed-off-by: Fabio Baltieri <fabio.baltieri@gmail.com>
5 files changed