drivers: gpio: Add missing port init for RX GPIO

The RX GPIO was originally develop for RX130 MCU which only have port
0 to 5 and A to J, this commit add missing port initialize for other RX
MCU family

Signed-off-by: Duy Nguyen <duy.nguyen.xa@renesas.com>

Author: duynguyenxa

drivers/gpio/gpio_renesas_rx.c

@@ -312,6 +312,10 @@ GPIO_DEVICE_INIT_RX_IF_OKAY(2);
 GPIO_DEVICE_INIT_RX_IF_OKAY(3);
 GPIO_DEVICE_INIT_RX_IF_OKAY(4);
 GPIO_DEVICE_INIT_RX_IF_OKAY(5);
+GPIO_DEVICE_INIT_RX_IF_OKAY(6);
+GPIO_DEVICE_INIT_RX_IF_OKAY(7);
+GPIO_DEVICE_INIT_RX_IF_OKAY(8);
+GPIO_DEVICE_INIT_RX_IF_OKAY(9);
 GPIO_DEVICE_INIT_RX_IF_OKAY(a);
 GPIO_DEVICE_INIT_RX_IF_OKAY(b);
 GPIO_DEVICE_INIT_RX_IF_OKAY(c);