soc: npcx: scfg: add functions to set/get WP pin status

The Write Protect pin of the internal SPI flash can be controlled by
WP_IF bit in DEV_CTL4 register. Add functions to set/get the status of
WP pin.

Signed-off-by: Jun Lin <CHLin56@nuvoton.com>
Change-Id: I8a0ce131f006f919a3b38a65722d0d312314ff0a
2 files changed