pinctrl: mediatek: fix Kconfig build errors for moore core

on i386 or x86_64:

Lots of build errors for drivers/pinctrl/mediatek/pinctrl-moore.c when
CONFIG_OF is not enabled (but COMPILE_TEST is).

first this:
WARNING: unmet direct dependencies detected for PINCTRL_MTK_MOORE
  Depends on [n]: PINCTRL [=y] && (ARCH_MEDIATEK || COMPILE_TEST [=y])
  && OF [=n]
  Selected by [y]:
  - PINCTRL_MT7623 [=y] && PINCTRL [=y] &&
  (ARCH_MEDIATEK || COMPILE_TEST [=y]) && (MACH_MT7623 || COMPILE_TEST [=y])

and then:
../drivers/pinctrl/mediatek/pinctrl-moore.c:22:44: error: array type has
   incomplete element type
   static const struct pinconf_generic_params mtk_custom_bindings[] = {
(etc)

Fixes: b5af33df50 ("pinctrl: mediatek: improve Kconfig dependencies")
Cc: stable@vger.kernel.org
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
Acked-by: Sean Wang <sean.wang@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/mediatek/Kconfig

@@ -45,12 +45,14 @@ config PINCTRL_MT2701
 config PINCTRL_MT7623
 	bool "Mediatek MT7623 pin control with generic binding"
 	depends on MACH_MT7623 || COMPILE_TEST
+	depends on OF
 	default MACH_MT7623
 	select PINCTRL_MTK_MOORE
 
 config PINCTRL_MT7629
 	bool "Mediatek MT7629 pin control"
 	depends on MACH_MT7629 || COMPILE_TEST
+	depends on OF
 	default MACH_MT7629
 	select PINCTRL_MTK_MOORE
 
@@ -92,6 +94,7 @@ config PINCTRL_MT6797
 
 config PINCTRL_MT7622
 	bool "MediaTek MT7622 pin control"
+	depends on OF
 	depends on ARM64 || COMPILE_TEST
 	default ARM64 && ARCH_MEDIATEK
 	select PINCTRL_MTK_MOORE