drivers: gpio: rcar: set default according to dt enabled
drivers: gpio: rcar: set default according to dt enabled

Set GPIO_RCAR to true if renesas,rcar-gpio status is okay.

Signed-off-by: Julien Massot <ad45d338e0f9dc7767e692227f7b2fcd41b31818@iot.bzh>

galak/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,galak/zephyr,finikorg/zephyr,galak/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr