gpio: Move to Samsung common GPIO library to drivers/gpio

It's common gpiolib for recent Samsung SoCs. Move to drivers/gpio

Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
diff --git a/arch/arm/plat-samsung/Makefile b/arch/arm/plat-samsung/Makefile
index e9de58a..53eb15b 100644
--- a/arch/arm/plat-samsung/Makefile
+++ b/arch/arm/plat-samsung/Makefile
@@ -19,7 +19,6 @@
 obj-y				+= gpio-config.o
 obj-y				+= dev-asocdma.o
 
-obj-$(CONFIG_SAMSUNG_GPIOLIB_4BIT)	+= gpiolib.o
 obj-$(CONFIG_SAMSUNG_CLKSRC)	+= clock-clksrc.o
 
 obj-$(CONFIG_SAMSUNG_IRQ_UART)	+= irq-uart.o
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index ebd1124..3735c05 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -86,6 +86,12 @@
 	help
 	  Say yes here to support GPIO functionality of IT8761E super I/O chip.
 
+config GPIO_PLAT_SAMSUNG
+	bool "Samsung SoCs GPIO library support"
+	default y if SAMSUNG_GPIOLIB_4BIT
+	help
+	  Say yes here to support Samsung SoCs GPIO library
+
 config GPIO_PL061
 	bool "PrimeCell PL061 GPIO support"
 	depends on ARM_AMBA
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index 7481e7d..426483f 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -8,6 +8,7 @@
 obj-$(CONFIG_GPIO_ADP5588)	+= adp5588-gpio.o
 obj-$(CONFIG_GPIO_BASIC_MMIO_CORE)	+= basic_mmio_gpio.o
 obj-$(CONFIG_GPIO_BASIC_MMIO)	+= basic_mmio_gpio.o
+obj-$(CONFIG_GPIO_PLAT_SAMSUNG)	+= gpio-plat-samsung.o
 obj-$(CONFIG_GPIO_LANGWELL)	+= langwell_gpio.o
 obj-$(CONFIG_GPIO_MAX730X)	+= max730x.o
 obj-$(CONFIG_GPIO_MAX7300)	+= max7300.o
diff --git a/arch/arm/plat-samsung/gpiolib.c b/drivers/gpio/gpio-plat-samsung.c
similarity index 100%
rename from arch/arm/plat-samsung/gpiolib.c
rename to drivers/gpio/gpio-plat-samsung.c