driver: pinctrl: adapt for mcxe31x series

- add binding files: nxp,mcxe31x-siul2-pinctrl.yaml
- Enable PINCTRL_NXP_SIUL2 when nxp,mcxe31x-siul2-pinctrl is ok

Signed-off-by: Lucien Zhao <lucien.zhao@nxp.com>
2 files changed