pinctrl: add mt7981 pinctrl driver

Add pinctrl driver for the MediaTek MT7981 SoC, based on the driver
which can also be found the SDK.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/ef5112946d16cacc67e65e439ba7b52a9950c1bb.1674693008.git.daniel@makrotopia.orgSigned-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/mediatek/Kconfig

@@ -127,6 +127,11 @@ config PINCTRL_MT7622
 	default ARM64 && ARCH_MEDIATEK
 	select PINCTRL_MTK_MOORE
 
+config PINCTRL_MT7981
+	bool "Mediatek MT7981 pin control"
+	depends on OF
+	select PINCTRL_MTK_MOORE
+
 config PINCTRL_MT7986
 	bool "Mediatek MT7986 pin control"
 	depends on OF

drivers/pinctrl/mediatek/Makefile

@@ -18,6 +18,7 @@ obj-$(CONFIG_PINCTRL_MT6797)	+= pinctrl-mt6797.o
 obj-$(CONFIG_PINCTRL_MT7622)	+= pinctrl-mt7622.o
 obj-$(CONFIG_PINCTRL_MT7623)	+= pinctrl-mt7623.o
 obj-$(CONFIG_PINCTRL_MT7629)	+= pinctrl-mt7629.o
+obj-$(CONFIG_PINCTRL_MT7981)	+= pinctrl-mt7981.o
 obj-$(CONFIG_PINCTRL_MT7986)	+= pinctrl-mt7986.o
 obj-$(CONFIG_PINCTRL_MT8167)	+= pinctrl-mt8167.o
 obj-$(CONFIG_PINCTRL_MT8173)	+= pinctrl-mt8173.o