[SCSI] drivers/scsi: Use ARRAY_SIZE macro

Use ARRAY_SIZE macro instead of sizeof(x)/sizeof(x[0]) and remove
duplicates of the macro.

Signed-off-by: Tobias Klauser <tklauser@nuerscht.ch>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
diff --git a/drivers/scsi/scsi_transport_spi.c b/drivers/scsi/scsi_transport_spi.c
index 780aaed..5829f97 100644
--- a/drivers/scsi/scsi_transport_spi.c
+++ b/drivers/scsi/scsi_transport_spi.c
@@ -146,7 +146,7 @@
 {
 	int i;
 
-	for (i = 0; i < sizeof(signal_types)/sizeof(signal_types[0]); i++) {
+	for (i = 0; i < ARRAY_SIZE(signal_types); i++) {
 		if (type == signal_types[i].value)
 			return signal_types[i].name;
 	}
@@ -156,7 +156,7 @@
 {
 	int i, len;
 
-	for (i = 0; i < sizeof(signal_types)/sizeof(signal_types[0]); i++) {
+	for (i = 0; i < ARRAY_SIZE(signal_types); i++) {
 		len =  strlen(signal_types[i].name);
 		if (strncmp(name, signal_types[i].name, len) == 0 &&
 		    (name[len] == '\n' || name[len] == '\0'))