pinctrl: uniphier: add UniPhier PH1-Pro4 pinctrl driver

Add pin configuration and pinmux support for UniPhier PH1-Pro4 SoC.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/drivers/pinctrl/uniphier/Kconfig b/drivers/pinctrl/uniphier/Kconfig
index 03593cd..c417a9f 100644
--- a/drivers/pinctrl/uniphier/Kconfig
+++ b/drivers/pinctrl/uniphier/Kconfig
@@ -9,4 +9,10 @@
 	default y
 	select PINCTRL_UNIPHIER_CORE
 
+config PINCTRL_UNIPHIER_PH1_PRO4
+	bool "UniPhier PH1-Pro4 SoC pinctrl driver"
+	depends on MACH_PH1_PRO4
+	default y
+	select PINCTRL_UNIPHIER_CORE
+
 endif