drivers: gpio: Add GPIO Fast Wake support

The fast wake feature in the MSPM0 GPIO peripheral allows the GPIO module
to stay in a low-power state and detect interrupt events on the device pins
without requiring a high-speed clock. This allows the device to support
fast wakeup from low-power modes, such as STOP and STANDBY, on any GPIO
pin.

Signed-off-by: Sanjay Vallimanalan <sanjay@linumiz.com>
Signed-off-by: Parthiban Nallathambi <parthiban@linumiz.com>