pinctrl: exynos5440: add pinctrl driver for Samsung EXYNOS5440 SoC

Add a new pinctrl driver for Samsung EXYNOS5440 SoC. The pin controller
module in EXYNOS5440 is different from the pin controller found on other
Samsung SoC. Hence, the pin controller driver for EXYNOS5440 SoC is
independent of the Samsung pinctrl framework.

Signed-off-by: Thomas Abraham <thomas.abraham@linaro.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig
index d96caefd..dd08b49 100644
--- a/drivers/pinctrl/Kconfig
+++ b/drivers/pinctrl/Kconfig
@@ -188,6 +188,11 @@
 	depends on OF && GPIOLIB
 	select PINCTRL_SAMSUNG
 
+config PINCTRL_EXYNOS5440
+	bool "Samsung EXYNOS5440 SoC pinctrl driver"
+	select PINMUX
+	select PINCONF
+
 config PINCTRL_MVEBU
 	bool
 	depends on ARCH_MVEBU