ARM: SAMSUNG: Introduce SAMSUNG_ATAGS Kconfig entry

This patch adds a Kconfig entry that enables compilation of legacy
support code required for Samsung platforms that require ATAGS based
boot.

This allows to bypass compilation of this code when platforms without
ATAGS support are selected.

Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index fc20cfc..aa8dcfc 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -702,6 +702,7 @@
 	select MULTI_IRQ_HANDLER
 	select NEED_MACH_GPIO_H
 	select NEED_MACH_IO_H
+	select SAMSUNG_ATAGS
 	help
 	  Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
 	  and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
@@ -726,6 +727,7 @@
 	select PLAT_SAMSUNG
 	select S3C_DEV_NAND
 	select S3C_GPIO_TRACK
+	select SAMSUNG_ATAGS
 	select SAMSUNG_CLKSRC
 	select SAMSUNG_GPIOLIB_4BIT
 	select SAMSUNG_IRQ_VIC_TIMER
@@ -744,6 +746,7 @@
 	select HAVE_S3C2410_WATCHDOG if WATCHDOG
 	select HAVE_S3C_RTC if RTC_CLASS
 	select NEED_MACH_GPIO_H
+	select SAMSUNG_ATAGS
 	help
 	  Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
 	  SMDK6450.
@@ -760,6 +763,7 @@
 	select HAVE_S3C2410_WATCHDOG if WATCHDOG
 	select HAVE_S3C_RTC if RTC_CLASS
 	select NEED_MACH_GPIO_H
+	select SAMSUNG_ATAGS
 	help
 	  Samsung S5PC100 series based systems
 
@@ -778,6 +782,7 @@
 	select HAVE_S3C_RTC if RTC_CLASS
 	select NEED_MACH_GPIO_H
 	select NEED_MACH_MEMORY_H
+	select SAMSUNG_ATAGS
 	help
 	  Samsung S5PV210/S5PC110 series based systems
 
@@ -796,6 +801,7 @@
 	select HAVE_S3C_RTC if RTC_CLASS
 	select NEED_MACH_GPIO_H
 	select NEED_MACH_MEMORY_H
+	select SAMSUNG_ATAGS
 	select USE_OF
 	help
 	  Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)