[ARM] S3C24XX: Fix SERIAL_SAMSUNG entry

The SERIAL_SAMSUNG needs SERIAL_CORE but doesn't select it, leading to a
build failure. Adding a 'select SERIAL_CORE' cure the trouble.
Signed-off-by: NArnaud Patard <arnaud.patard@rtp-net.org>
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

drivers/serial/Kconfig

@@ -451,6 +451,7 @@ config SERIAL_CLPS711X_CONSOLE
 config SERIAL_SAMSUNG
 	tristate "Samsung SoC serial support"
 	depends on ARM && PLAT_S3C24XX
+	select SERIAL_CORE
 	help
 	  Support for the on-chip UARTs on the Samsung S3C24XX series CPUs,
 	  providing /dev/ttySAC0, 1 and 2 (note, some machines may not