Intel e7505: build as separate object file

No longer include northbridge files directly in the source for
mainboard romstage.c and fix includes.

Also make required adjustments to function declarations.

Change-Id: Iafdcc0766ed44c64cc628e5935eef2c6372f5f22
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/906
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
diff --git a/src/northbridge/intel/e7505/Makefile.inc b/src/northbridge/intel/e7505/Makefile.inc
index 23eada5..8c50e40 100644
--- a/src/northbridge/intel/e7505/Makefile.inc
+++ b/src/northbridge/intel/e7505/Makefile.inc
@@ -1 +1,3 @@
 ramstage-y += northbridge.c
+romstage-y += raminit.c
+romstage-y += debug.c