drivers/intel/gma: Equality comparison with extraneous parentheses

Spotted by Clang.

Change-Id: I3e612c0fa050a09fa7e5b1cb643935b84eb2b957
Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-on: http://review.coreboot.org/6053
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Idwer Vollering <vidwer@gmail.com>
1 file changed