northbridge/intel/x4x: Intel 4-series northbridge support

Boots to console on Gigabyte GA-G41M-ES2L

Ram initialization *not* included in this patch
VGA native init works on analog connector

Change-Id: I5262f73fd03d5e5c12e9f11d027bdfbbf0ddde82
Signed-off-by: Damien Zammit <damien@zamaudio.com>
Reviewed-on: https://review.coreboot.org/11305
Tested-by: build bot (Jenkins)
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
diff --git a/src/Kconfig b/src/Kconfig
index 38cf855..c30702f 100644
--- a/src/Kconfig
+++ b/src/Kconfig
@@ -358,6 +358,7 @@
 config CBFS_SIZE
 	hex "Size of CBFS filesystem in ROM"
 	default 0x100000 if HAVE_INTEL_FIRMWARE || \
+	  NORTHBRIDGE_INTEL_X4X || \
 	  NORTHBRIDGE_INTEL_GM45 || NORTHBRIDGE_INTEL_SANDYBRIDGE_MRC || \
 	  NORTHBRIDGE_INTEL_IVYBRIDGE_MRC || NORTHBRIDGE_INTEL_IVYBRIDGE || \
 	  NORTHBRIDGE_INTEL_SANDYBRIDGE || \