superio/serverengines/pilot: Avoid .c includes

Following the same reasoning as commit
d3043313a91dff3bc2f879ffb3b4bf23a364d711 superio/fintek/f81865f: Avoid
.c includes
Clean up the early_serial #include directives in mainboard/romstage code.

Change-Id: Ia6ed36c8517a95b651fefdd855eec0ec91d73187
Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-on: http://review.coreboot.org/5439
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
diff --git a/src/mainboard/hp/dl165_g6_fam10/romstage.c b/src/mainboard/hp/dl165_g6_fam10/romstage.c
index 8e109c5..474190b 100644
--- a/src/mainboard/hp/dl165_g6_fam10/romstage.c
+++ b/src/mainboard/hp/dl165_g6_fam10/romstage.c
@@ -46,8 +46,7 @@
 #include "lib/delay.c"
 #include "cpu/x86/lapic.h"
 #include "northbridge/amd/amdfam10/reset_test.c"
-#include "superio/serverengines/pilot/early_serial.c"
-#include "superio/serverengines/pilot/early_init.c"
+#include <superio/serverengines/pilot/pilot.h>
 #include "superio/nsc/pc87417/early_serial.c"
 #include "cpu/x86/bist.h"
 #include "northbridge/amd/amdfam10/debug.c"