AGESA: Use common header for agesawrapper

Change-Id: I5189d0c55635aeb29553fd04a67490cfee3d88d5
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/7153
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Tested-by: build bot (Jenkins)

src/mainboard/amd/thatcher/acpi_tables.c

@@ -17,7 +17,7 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
-#include "agesawrapper.h"
+#include <northbridge/amd/agesa/agesawrapper.h>
 
 #include <console/console.h>
 #include <string.h>