nb/intel/x4x: Avoid x4x.h header with romcc-bootblock

Change-Id: If8b70298bffd72d1de7f74917131d648c5fcab66
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/35641
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>

src/northbridge/intel/x4x/bootblock.c

@@ -16,7 +16,10 @@
 
 #include <device/pci_ops.h>
 #include "iomap.h"
-#include "x4x.h"
+
+/* Just re-define these instead of including x4x.h. It blows up romcc. */
+#define D0F0_PCIEXBAR_LO 0x60
+#define D0F0_PCIEXBAR_HI 0x64
 
 static void bootblock_northbridge_init(void)
 {