pinctrl: uniphier: rework UniPhier pinctrl entries in Kconfig

There is a plan to support more pinctrl drivers for this SoC family.
Move the driver entries into a sub menu by using "menuconfig".
Also, add the missing dependency "depends on OF && MFD_SYSCON".
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/uniphier/Kconfig

-if ARCH_UNIPHIER
-
-config PINCTRL_UNIPHIER
-	bool
+menuconfig PINCTRL_UNIPHIER
+	bool "UniPhier SoC pinctrl drivers"
+	depends on ARCH_UNIPHIER
+	depends on OF && MFD_SYSCON
+	default y
 	select PINMUX
 	select GENERIC_PINCONF
 
+if PINCTRL_UNIPHIER
+
 config PINCTRL_UNIPHIER_PH1_LD4
 	tristate "UniPhier PH1-LD4 SoC pinctrl driver"
-	select PINCTRL_UNIPHIER
+	default y
 
 config PINCTRL_UNIPHIER_PH1_PRO4
 	tristate "UniPhier PH1-Pro4 SoC pinctrl driver"
-	select PINCTRL_UNIPHIER
+	default y
 
 config PINCTRL_UNIPHIER_PH1_SLD8
 	tristate "UniPhier PH1-sLD8 SoC pinctrl driver"
-	select PINCTRL_UNIPHIER
+	default y
 
 config PINCTRL_UNIPHIER_PH1_PRO5
 	tristate "UniPhier PH1-Pro5 SoC pinctrl driver"
-	select PINCTRL_UNIPHIER
+	default y
 
 config PINCTRL_UNIPHIER_PROXSTREAM2
 	tristate "UniPhier ProXstream2 SoC pinctrl driver"
-	select PINCTRL_UNIPHIER
+	default y
 
 config PINCTRL_UNIPHIER_PH1_LD6B
 	tristate "UniPhier PH1-LD6b SoC pinctrl driver"
-	select PINCTRL_UNIPHIER
+	default y
 
 endif