pinctrl: uniphier: add UniPhier pinctrl core support

The core support for the pinctrl drivers for all the UniPhier SoCs.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig
index b8146df..3b6e3b7 100644
--- a/drivers/pinctrl/Kconfig
+++ b/drivers/pinctrl/Kconfig
@@ -124,4 +124,6 @@
 
 endif
 
+source "drivers/pinctrl/uniphier/Kconfig"
+
 endmenu