x200/romstage: Add missing include.

Change-Id: I47aa8619ba1e1939707ec654ffb54cae316929cf
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-on: http://review.coreboot.org/7684
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Tested-by: build bot (Jenkins)
1 file changed