nb/intel/haswell/gma.c: Drop unused ChromeOS include

Change-Id: I598fe743354ea429d6821b95be7d209a9fcf9f0c
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/46693
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/northbridge/intel/haswell/gma.c

@@ -21,10 +21,6 @@
 #include "chip.h"
 #include "haswell.h"
 
-#if CONFIG(CHROMEOS)
-#include <vendorcode/google/chromeos/chromeos.h>
-#endif
-
 struct gt_reg {
 	u32 reg;
 	u32 andmask;