src/northbridge: Add missing 'include <types.h>'

<types.h> is supposed to provide <stdint.h> and <stddef.h>.
When <types.h> is included, <stdint.h> and/or <stddef.h> is removed.

Change-Id: Iad5367bed844b866b2ad87639eee29a16d9a99ed
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32808
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Lijian Zhao <lijian.zhao@intel.com>
diff --git a/src/northbridge/intel/x4x/gma.c b/src/northbridge/intel/x4x/gma.c
index c4e8bf1..61731fe 100644
--- a/src/northbridge/intel/x4x/gma.c
+++ b/src/northbridge/intel/x4x/gma.c
@@ -29,6 +29,7 @@
 #include <drivers/intel/gma/libgfxinit.h>
 #include <pc80/vga.h>
 #include <pc80/vga_io.h>
+#include <types.h>
 
 #include "chip.h"
 #include "drivers/intel/gma/i915_reg.h"