pinctrl: s32cc: enable the input buffer for a GPIO

pinctrl: s32cc: enable the input buffer for a GPIO

The IBE (input buffer enable) should be enabled for a GPIO. Reading the
value will return the one from the input register, writing the value
will return the one from the output register.

This offers the flexibility to check if the value intended to be set
matches the actual physical one.

Signed-off-by: Florin Buica <florin.buica@nxp.com>
Signed-off-by: Andrei Stefanescu <andrei.stefanescu@oss.nxp.com>
Link: https://lore.kernel.org/20240723131832.1171036-2-andrei.stefanescu@oss.nxp.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>