nb/intel/{nehalem,x4x}: Remove unused 'include <pc80/vga_io.h>'

Change-Id: If9c743335ab09038c9e22d1f4d3b7411585b2c8c
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36384
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>

src/northbridge/intel/nehalem/gma.c

@@ -27,7 +27,6 @@
 #include <drivers/intel/gma/intel_bios.h>
 #include <drivers/intel/gma/libgfxinit.h>
 #include <pc80/vga.h>
-#include <pc80/vga_io.h>
 #include <southbridge/intel/ibexpeak/nvs.h>
 #include <drivers/intel/gma/opregion.h>
 #include <cbmem.h>

src/northbridge/intel/x4x/gma.c

@@ -28,7 +28,6 @@
 #include <drivers/intel/gma/opregion.h>
 #include <drivers/intel/gma/libgfxinit.h>
 #include <pc80/vga.h>
-#include <pc80/vga_io.h>
 #include <types.h>
 
 #include "chip.h"