Lumpy: Need byteorder.h in romstage

Not sure why this never triggered an error before.

Change-Id: I85d8b3b862492df04163a5f751c7ea4288406860
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: http://review.coreboot.org/1946
Tested-by: build bot (Jenkins)
Reviewed-by: David Hendricks <dhendrix@chromium.org>

src/mainboard/samsung/lumpy/romstage.c

@@ -24,6 +24,7 @@
 #include <timestamp.h>
 #include <arch/io.h>
 #include <arch/romcc_io.h>
+#include <arch/byteorder.h>
 #include <device/pci_def.h>
 #include <device/pnp_def.h>
 #include <cpu/x86/lapic.h>