[SCSI] aic7xxx: add static

This patch adds static (and sometimes const) keywords where appropriate.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Acked-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
diff --git a/drivers/scsi/aic7xxx/aic79xx_osm.c b/drivers/scsi/aic7xxx/aic79xx_osm.c
index 6c52877..ea0bbda 100644
--- a/drivers/scsi/aic7xxx/aic79xx_osm.c
+++ b/drivers/scsi/aic7xxx/aic79xx_osm.c
@@ -388,7 +388,6 @@
 
 /***************************** Low Level I/O **********************************/
 uint8_t ahd_inb(struct ahd_softc * ahd, long port);
-uint16_t ahd_inw_atomic(struct ahd_softc * ahd, long port);
 void ahd_outb(struct ahd_softc * ahd, long port, uint8_t val);
 void ahd_outw_atomic(struct ahd_softc * ahd,
 				     long port, uint16_t val);
@@ -411,7 +410,8 @@
 	return (x);
 }
 
-uint16_t
+#if 0 /* unused */
+static uint16_t
 ahd_inw_atomic(struct ahd_softc * ahd, long port)
 {
 	uint8_t x;
@@ -424,6 +424,7 @@
 	mb();
 	return (x);
 }
+#endif
 
 void
 ahd_outb(struct ahd_softc * ahd, long port, uint8_t val)