[ARM] 3836/1: S3C24XX: Clear both EINT and INT status before sleep

Clear both the EINT and INT status before
going to sleep, otherwise we may end up being
woken by something that was not set in our
wakeup map.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>