pinctrl: mediatek: add support for different pinctrl

Due to the pinctrl hardware of MT7622 is difference from others
SoC which using the common part of mediatek pinctrl.
So we need to modify the common part of mediatek pinctrl.

diff --git a/drivers/pinctrl/mediatek/pinctrl-mt8516.c b/drivers/pinctrl/mediatek/pinctrl-mt8516.c
index 829b30e..62e339e 100644
--- a/drivers/pinctrl/mediatek/pinctrl-mt8516.c
+++ b/drivers/pinctrl/mediatek/pinctrl-mt8516.c
@@ -369,6 +369,8 @@
 	.ngrps = ARRAY_SIZE(mt8516_groups),
 	.funcs = mt8516_functions,
 	.nfuncs = ARRAY_SIZE(mt8516_functions),
+	.gpio_mode = 0,
+	.rev = MTK_PINCTRL_V1,
 };
 
 static int mtk_pinctrl_mt8516_probe(struct udevice *dev)