[PATCH] drivers/mtd: 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>
Cc: Thomas Gleixner <tglx@linutronix.de>
Acked-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/drivers/mtd/maps/h720x-flash.c b/drivers/mtd/maps/h720x-flash.c
index 3190948..0667101 100644
--- a/drivers/mtd/maps/h720x-flash.c
+++ b/drivers/mtd/maps/h720x-flash.c
@@ -59,7 +59,7 @@
         }
 };
 
-#define NUM_PARTITIONS  (sizeof(h720x_partitions)/sizeof(h720x_partitions[0]))
+#define NUM_PARTITIONS ARRAY_SIZE(h720x_partitions)
 
 static int                   nr_mtd_parts;
 static struct mtd_partition *mtd_parts;