pinctrl: mediatek: add missing options to PINCTRL_MT7981

There are options missing from PINCTRL_MT7981 whilst being on every other
pin controller. Add them.

Signed-off-by: Arınç ÜNAL <arinc.unal@arinc9.com>
Acked-by: Daniel Golle <daniel@makrotopia.org>
Link: https://lore.kernel.org/r/20230218065108.8958-1-arinc.unal@arinc9.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

Author: arinc9

drivers/pinctrl/mediatek/Kconfig

@@ -130,6 +130,8 @@ config PINCTRL_MT7622
 config PINCTRL_MT7981
 	bool "Mediatek MT7981 pin control"
 	depends on OF
+	depends on ARM64 || COMPILE_TEST
+	default ARM64 && ARCH_MEDIATEK
 	select PINCTRL_MTK_MOORE
 
 config PINCTRL_MT7986