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

Since MSPM0L111x and MSPM0L222x have a common pin configuration for some
of the pins, the mspm0l111x-222x-common-pinctrl.dtsi file is added with
the shared pin configuration. The MSPM0L222x dtsi is modified to take
advantage of this.

The naming convetion was kept from the original 222x variant, with some
modifications for SPI CS pins which didn't correctly reflect their function.
For example, there was: `spi0_cs3_cd_poci3_pa01: spi0_cs3_cd_poci3_pa01`
node for the PINCM2 function 10 which in data sheet is named only SPI0_CS3,
and now the node is named: `spi0_cs3_pa01: spi0_cs3_pa01`.

As for MSPM0L111x:
- 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
Link: https://www.ti.com/lit/ds/symlink/mspm0l2228.pdf
Signed-off-by: Razvan Heghedus <razvan.heghedus@protonmail.com>

Author: b85a540ea