[ARM] 4161/1: S3C24XX: fix leakage of plat-s3c24xx Kconfig items

Do not export S3C24XX from plat-s3c24xx on non-s3c24xx systems
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

arch/arm/plat-s3c24xx/Kconfig

@@ -7,10 +7,12 @@
 config PLAT_S3C24XX
 	bool
 	depends on ARCH_S3C2410
-	default y
+	default y if ARCH_S3C2410
 	help
 	  Base platform code for any Samsung S3C device
 
+if PLAT_S3C24XX
+
 config CPU_S3C244X
 	bool
 	depends on ARCH_S3C2410 && (CPU_S3C2440 || CPU_S3C2442)
@@ -94,3 +96,4 @@ config MACH_SMDK
 	help
 	  Common machine code for SMDK2410 and SMDK2440
 
+endif