src/southbridge: 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: I4d8628e4ce3c7f80da2590b4cad618b290e0d513
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32809
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Lijian Zhao <lijian.zhao@intel.com>

src/southbridge/intel/common/smbus.c

@@ -19,6 +19,8 @@
 #include <console/console.h>
 #include <device/smbus_def.h>
 #include <stdlib.h>
+#include <types.h>
+
 #include "smbus.h"