[PATCH] ARM: 2763/1: S3C24XX - mark IRQ_LCD as valid

Patch from Ben Dooks

Fix the IRQ_LCD so that it is marked as valid
since we no longer de-mux this in the main IRQ
handler.

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