[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/sc520cdp.c b/drivers/mtd/maps/sc520cdp.c
index ed92afa..e8c130e 100644
--- a/drivers/mtd/maps/sc520cdp.c
+++ b/drivers/mtd/maps/sc520cdp.c
@@ -107,7 +107,7 @@
 	},
 };
 
-#define NUM_FLASH_BANKS	(sizeof(sc520cdp_map)/sizeof(struct map_info))
+#define NUM_FLASH_BANKS	ARRAY_SIZE(sc520cdp_map)
 
 static struct mtd_info *mymtd[NUM_FLASH_BANKS];
 static struct mtd_info *merged_mtd;