pinctrl: meson-axg: add missing GPIOA_18

Add the missing GPIOA_18 from the missing EE gpio list.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
diff --git a/drivers/pinctrl/meson/pinctrl-meson-axg.c b/drivers/pinctrl/meson/pinctrl-meson-axg.c
index 8f23c8c..11809b2 100644
--- a/drivers/pinctrl/meson/pinctrl-meson-axg.c
+++ b/drivers/pinctrl/meson/pinctrl-meson-axg.c
@@ -298,6 +298,7 @@
 	GPIO_GROUP(GPIOA_15, EE_OFF),
 	GPIO_GROUP(GPIOA_16, EE_OFF),
 	GPIO_GROUP(GPIOA_17, EE_OFF),
+	GPIO_GROUP(GPIOA_18, EE_OFF),
 	GPIO_GROUP(GPIOA_19, EE_OFF),
 	GPIO_GROUP(GPIOA_20, EE_OFF),