[ARM] Fix cats build

Fix more fallout from 894673ee.

arch/arm/mach-footbridge/cats-hw.c: In function 'fixup_cats':
arch/arm/mach-footbridge/cats-hw.c:81: error: 'ORIG_VIDEO_LINES' undeclared (first use in this function)
...

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