drivers: gpio_sam: Add ACCESS_BY_PORT mode for gpio config
drivers: gpio_sam: Add ACCESS_BY_PORT mode for gpio config

ACCESS_BY_PORT mode can configure all the pins the same way in the port.

Signed-off-by: qianfan Zhao <0d01fab1932da5a147025f14dd5829cf5bf10d4d@163.com>

nashif/zephyr,finikorg/zephyr,GiulianoFranchetto/zephyr,nashif/zephyr,GiulianoFranchetto/zephyr,galak/zephyr,Vudentz/zephyr,Vudentz/zephyr,Vudentz/zephyr,Vudentz/zephyr,punitvara/zephyr,explora26/zephyr,GiulianoFranchetto/zephyr,finikorg/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,punitvara/zephyr,explora26/zephyr,zephyrproject-rtos/zephyr,Vudentz/zephyr,punitvara/zephyr,galak/zephyr,ldts/zephyr,explora26/zephyr,galak/zephyr,explora26/zephyr,GiulianoFranchetto/zephyr,punitvara/zephyr,ldts/zephyr,punitvara/zephyr,finikorg/zephyr,nashif/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,nashif/zephyr,ldts/zephyr,Vudentz/zephyr,finikorg/zephyr,ldts/zephyr,nashif/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,ldts/zephyr,GiulianoFranchetto/zephyr,galak/zephyr,explora26/zephyr