mainboard/*/romstage.c: Fix 'lib/delay.c' inclusion

Use 'delay.h' header rather than directly including 'delay.c'
source. N.B. Some amdfam10 and K8 boards are not included in
this changeset since unrelated issues are woven in there.

Change-Id: Ibc0c0e560d8eedaf5c3150f95ba72fe5dd8d6f3a
Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-on: http://review.coreboot.org/8086
Tested-by: build bot (Jenkins)
Reviewed-by: Marc Jones <marc.jones@se-eng.com>
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
diff --git a/src/mainboard/hp/dl165_g6_fam10/romstage.c b/src/mainboard/hp/dl165_g6_fam10/romstage.c
index b2f4c10..3c781df 100644
--- a/src/mainboard/hp/dl165_g6_fam10/romstage.c
+++ b/src/mainboard/hp/dl165_g6_fam10/romstage.c
@@ -43,7 +43,7 @@
 #include <northbridge/amd/amdfam10/amdfam10.h>
 #include <lib.h>
 #include <spd.h>
-#include "lib/delay.c"
+#include <delay.h>
 #include <cpu/x86/lapic.h>
 #include "northbridge/amd/amdfam10/reset_test.c"
 #include <superio/serverengines/pilot/pilot.h>