nvs: Add missing stdint.h include.

nvs.h uses u8 without including stdint.h.

Change-Id: I4ffcbb850cb7b8f47126ee1906b9e0960dd449e8
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-on: http://review.coreboot.org/10331
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Edward O'Callaghan <edward.ocallaghan@koparo.com>

src/southbridge/intel/bd82x6x/nvs.h

@@ -18,6 +18,7 @@
  * Foundation, Inc.
  */
 
+#include <stdint.h>
 #include "vendorcode/google/chromeos/gnvs.h"
 typedef struct {
 	/* Miscellaneous */