dev: ti: mspm0: l: Add common pinmux for MSPM0L111x

- Based on the TI datasheet.
- All pins support being used as GPIO.
- Use input-enable for all PIN TYPE I on datasheet + SPI POCI pins.
- Define MSPM0_PIN_FUNCTION_ANALOG for every pin which is unconnected
  state (essentially needed for low power consumption).

Link: https://www.ti.com/lit/ds/symlink/mspm0l1116.pdf
Signed-off-by: Razvan Heghedus <razvan.heghedus@protonmail.com>

Author: b85a540ea