superio/nsc/pc87360: Use link-time symbol over .c includes

Change-Id: Id6d9efc93fdaff63dcaab50712ac9be35ccb42a7
Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-on: http://review.coreboot.org/8053
Tested-by: build bot (Jenkins)
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>

src/mainboard/arima/hdama/romstage.c

@@ -12,7 +12,7 @@
 #include "lib/delay.c"
 #include "northbridge/amd/amdk8/reset_test.c"
 #include "northbridge/amd/amdk8/debug.c"
-#include "superio/nsc/pc87360/early_serial.c"
+#include <superio/nsc/pc87360/pc87360.h>
 #include "cpu/x86/bist.h"
 #include "northbridge/amd/amdk8/setup_resource_map.c"
 #include <spd.h>

src/mainboard/hp/e_vectra_p2706t/romstage.c

@@ -25,7 +25,7 @@
 #include <stdlib.h>
 #include <console/console.h>
 /* TODO: It's a PC87364 actually! */
-#include "superio/nsc/pc87360/early_serial.c"
+#include <superio/nsc/pc87360/pc87360.h>
 /* TODO: It's i810E actually! */
 #include "northbridge/intel/i82810/raminit.h"
 #include "cpu/x86/bist.h"

src/superio/nsc/pc87360/Makefile.inc

@@ -19,4 +19,5 @@
 ## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 ##
 
+romstage-$(CONFIG_SUPERIO_NSC_PC87360) += early_serial.c
 ramstage-$(CONFIG_SUPERIO_NSC_PC87360) += superio.c

src/superio/nsc/pc87360/early_serial.c

@@ -20,9 +20,11 @@
  */
 
 #include <arch/io.h>
+#include <device/pnp.h>
+#include <stdint.h>
 #include "pc87360.h"
 
-static void pc87360_enable_serial(pnp_devfn_t dev, u16 iobase)
+void pc87360_enable_serial(pnp_devfn_t dev, u16 iobase)
 {
 	pnp_set_logical_device(dev);
 	pnp_set_enable(dev, 0);

src/superio/nsc/pc87360/pc87360.h

@@ -19,8 +19,8 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
-#ifndef SUPERIO_NSC_PC87360_PC87360_H
-#define SUPERIO_NSC_PC87360_PC87360_H
+#ifndef SUPERIO_NSC_PC87360_H
+#define SUPERIO_NSC_PC87360_H
 
 #define PC87360_FDC  0x00 /* Floppy */
 #define PC87360_PP   0x01 /* Parallel port */
@@ -34,4 +34,9 @@
 #define PC87360_FSCM 0x09
 #define PC87360_WDT  0x0A
 
-#endif
+#include <arch/io.h>
+#include <stdint.h>
+
+void pc87360_enable_serial(pnp_devfn_t dev, u16 iobase);
+
+#endif /* SUPERIO_NSC_PC87360_H */

src/superio/nsc/pc87360/superio.c

@@ -30,7 +30,6 @@
 
 static void init(struct device *dev)
 {
-
 	if (!dev->enabled)
 		return;