[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/aic7xxx_old.c b/drivers/scsi/aic7xxx_old.c
index 770f164..5dba1c6 100644
--- a/drivers/scsi/aic7xxx_old.c
+++ b/drivers/scsi/aic7xxx_old.c
@@ -1565,7 +1565,7 @@
   struct sequencer_patch *last_patch;
   int num_patches;
 
-  num_patches = sizeof(sequencer_patches)/sizeof(struct sequencer_patch);
+  num_patches = ARRAY_SIZE(sequencer_patches);
   last_patch = &sequencer_patches[num_patches];
   cur_patch = *start_patch;