drivers/ide/legacy/hd.c: Array size calculation using sizeof replaced with ARRAY_SIZE

This patch replaces an array size calculation in drivers/ide/legacy/hd.c
that was done using sizeof with the ARRAY_SIZE macro.

Tested by compilation on an i386 box using "allyesconfig".
Diffed against Linus' git-tree.
Signed-off-by: Andi Drebes <lists-receive@programmierforen.de>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

drivers/ide/legacy/hd.c

@@ -130,7 +130,7 @@ struct hd_i_struct {
 	
 #ifdef HD_TYPE
 static struct hd_i_struct hd_info[] = { HD_TYPE };
-static int NR_HD = ((sizeof (hd_info))/(sizeof (struct hd_i_struct)));
+static int NR_HD = ARRAY_SIZE(hd_info);
 #else
 static struct hd_i_struct hd_info[MAX_HD];
 static int NR_HD;