[ARM] 4368/1: S3C24xx: build fix

Trying to build current git tree fails. The failure is due to commit
25ff0a65

. The patch title say it's for
OMAP board while it's applied on S3C2410 Kconfig entry. Moreover, the
OMAP entry is already selecting GENERIC_TIME.

This patch reverts the offending commit.

Signed-off-by: Arnaud Patard <arnaud.patard@rtp-net.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>