pinctrl: UniPhier: add UniPhier PH1-sLD8 pinctrl driver

Add pin configuration and pinmux support for UniPhier PH1-sLD8 SoC.

Changes in v2:
  - sort groups and funcs alphabetically
  - add i2c pin-mux settings
  - sort members of platform_driver
  - change to tristate
  - add THIS_MODULE to pinctrl_desc
  - use module_platform_driver

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/drivers/pinctrl/uniphier/Kconfig b/drivers/pinctrl/uniphier/Kconfig
index 944803f..f4a21fe 100644
--- a/drivers/pinctrl/uniphier/Kconfig
+++ b/drivers/pinctrl/uniphier/Kconfig
@@ -13,4 +13,8 @@
 	tristate "UniPhier PH1-Pro4 SoC pinctrl driver"
 	select PINCTRL_UNIPHIER_CORE
 
+config PINCTRL_UNIPHIER_PH1_SLD8
+	tristate "UniPhier PH1-sLD8 SoC pinctrl driver"
+	select PINCTRL_UNIPHIER_CORE
+
 endif