pinctrl: nuvoton: Fix up Kconfig deps

We have build errors due to missing dependency on OF.
Add the dependency and do it the same way for all three
Nuvotons while we are at it.
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20230913-novoton-kconfig-v1-1-1c2dff14c0d2@linaro.org

drivers/pinctrl/nuvoton/Kconfig

@@ -2,8 +2,7 @@
 
 config PINCTRL_WPCM450
 	tristate "Pinctrl and GPIO driver for Nuvoton WPCM450"
-	depends on ARCH_WPCM450 || COMPILE_TEST
-	depends on OF
+	depends on (ARCH_WPCM450 || COMPILE_TEST) && OF
 	select PINMUX
 	select PINCONF
 	select GENERIC_PINCONF
@@ -35,7 +34,7 @@ config PINCTRL_NPCM7XX
 
 config PINCTRL_NPCM8XX
 	tristate "Pinctrl and GPIO driver for Nuvoton NPCM8XX"
-	depends on ARCH_NPCM || COMPILE_TEST
+	depends on (ARCH_NPCM || COMPILE_TEST) && OF
 	select PINMUX
 	select PINCONF
 	select GENERIC_PINCONF