[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/in2000.c b/drivers/scsi/in2000.c
index 89a57a6..883bc92 100644
--- a/drivers/scsi/in2000.c
+++ b/drivers/scsi/in2000.c
@@ -1809,7 +1809,7 @@
 
 
 #define MAX_IN2000_HOSTS 3
-#define MAX_SETUP_ARGS (sizeof(setup_args) / sizeof(char *))
+#define MAX_SETUP_ARGS ARRAY_SIZE(setup_args)
 #define SETUP_BUFFER_SIZE 200
 static char setup_buffer[SETUP_BUFFER_SIZE];
 static char setup_used[MAX_SETUP_ARGS];