superio/fintek/f71863fg: Avoid .c includes

Following the same reasoning as commit
d304331 superio/fintek/f81865f: Avoid .c includes
Clean up the early_serial #include directives in mainboard/romstage code.

Change-Id: I863c16634873224c17e43100271e9b91419724d0
Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-on: http://review.coreboot.org/5435
Tested-by: build bot (Jenkins)
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
diff --git a/src/mainboard/jetway/pa78vm5/romstage.c b/src/mainboard/jetway/pa78vm5/romstage.c
index b8fa48e..c082a67 100644
--- a/src/mainboard/jetway/pa78vm5/romstage.c
+++ b/src/mainboard/jetway/pa78vm5/romstage.c
@@ -42,7 +42,7 @@
 #include "northbridge/amd/amdfam10/reset_test.c"
 #include <console/loglevel.h>
 #include "cpu/x86/bist.h"
-#include "superio/fintek/f71863fg/early_serial.c"
+#include <superio/fintek/f71863fg/f71863fg.h>
 #include <cpu/amd/mtrr.h>
 #include "northbridge/amd/amdfam10/setup_resource_map.c"
 #include "southbridge/amd/rs780/early_setup.c"