ARM: SAMSUNG: change GENERIC_GPIO to ARCH_REQUIRE_GPIOLIB

When I applied regarding samsung-time patches, the "select GENERIC_GPIO"
has been added wrong, so this patch fixes that.
And since the GENERIC_GPIO in arch/arm/ will be gone away, this adds
ARCH_REQUIRE_GPIOLIB for S3C24XX and S5PC100 instead.
Reported-by: NAlexandre Courbot <gnurou@gmail.com>
Cc: Romain Naour <romain.naour@openwide.fr>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

arch/arm/Kconfig

@@ -770,10 +770,10 @@ config ARCH_SA1100
 config ARCH_S3C24XX
 	bool "Samsung S3C24XX SoCs"
 	select ARCH_HAS_CPUFREQ
+	select ARCH_REQUIRE_GPIOLIB
 	select CLKDEV_LOOKUP
 	select CLKSRC_MMIO
 	select GENERIC_CLOCKEVENTS
-	select GENERIC_GPIO
 	select HAVE_CLK
 	select HAVE_S3C2410_I2C if I2C
 	select HAVE_S3C2410_WATCHDOG if WATCHDOG
@@ -828,11 +828,11 @@ config ARCH_S5P64X0
 
 config ARCH_S5PC100
 	bool "Samsung S5PC100"
+	select ARCH_REQUIRE_GPIOLIB
 	select CLKDEV_LOOKUP
 	select CLKSRC_MMIO
 	select CPU_V7
 	select GENERIC_CLOCKEVENTS
-	select GENERIC_GPIO
 	select HAVE_CLK
 	select HAVE_S3C2410_I2C if I2C
 	select HAVE_S3C2410_WATCHDOG if WATCHDOG