superio/winbond/w83627ehg: 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: Ib3a12fb8160729008bdaa8026365675a11325da0
Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-on: http://review.coreboot.org/5448
Tested-by: build bot (Jenkins)
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
diff --git a/src/mainboard/msi/ms9652_fam10/romstage.c b/src/mainboard/msi/ms9652_fam10/romstage.c
index b21fb02..ad7dcde 100644
--- a/src/mainboard/msi/ms9652_fam10/romstage.c
+++ b/src/mainboard/msi/ms9652_fam10/romstage.c
@@ -39,7 +39,7 @@
 #include "lib/delay.c"
 #include "cpu/x86/lapic.h"
 #include "northbridge/amd/amdfam10/reset_test.c"
-#include "superio/winbond/w83627ehg/early_serial.c"
+#include <superio/winbond/w83627ehg/w83627ehg.h>
 #include "cpu/x86/bist.h"
 #include "northbridge/amd/amdfam10/debug.c"
 #include "northbridge/amd/amdfam10/setup_resource_map.c"