ARM: S3C64XX: Kill CONFIG_PLAT_S3C64XX

CONFIG_PLAT_S3C64XX has been kept in place way too long since it was
marked as temporary in commit

110d85a ARM: S3C64XX: Eliminate plat-s3c64xx

After fixing all users of it in previous patches, this patch finally
kills this temporary Kconfig entry.

Signed-off-by: Tomasz Figa <tomasz.figa@gmail.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 4a329c7..4270cd7 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -737,11 +737,13 @@
 	select NEED_MACH_GPIO_H
 	select NO_IOPORT
 	select PLAT_SAMSUNG
+	select PM_GENERIC_DOMAINS
 	select S3C_DEV_NAND
 	select S3C_GPIO_TRACK
 	select SAMSUNG_ATAGS
 	select SAMSUNG_CLKSRC
 	select SAMSUNG_GPIOLIB_4BIT
+	select SAMSUNG_WAKEMASK
 	select SAMSUNG_WDT_RESET
 	select USB_ARCH_HAS_OHCI
 	help