pinctrl: s32cc: add update and overwrite options when setting pinconf

The previous pinconf settings(made by the bootloader) need to be
overwritten when configuring the pinctrl of a driver during the boot
process.

Configuring the bias of a GPIO at runtime (e.g. pull-up) needs to
preserve the other settings unaltered.

This patch introduces changes to differentiate between the two cases.

Signed-off-by: Radu Pirea <radu-nicolae.pirea@nxp.com>
Signed-off-by: Florin Buica <florin.buica@nxp.com>
Signed-off-by: Andrei Stefanescu <andrei.stefanescu@oss.nxp.com>
Link: https://lore.kernel.org/20240723131832.1171036-4-andrei.stefanescu@oss.nxp.com


Signed-off-by: Linus Walleij <linus.walleij@linaro.org>