md/linear: remove typedefs: dev_info_t -> struct dev_info

Signed-off-by: NeilBrown <neilb@suse.de>

drivers/md/linear.h

@@ -6,13 +6,11 @@ struct dev_info {
 	sector_t	end_sector;
 };
 
-typedef struct dev_info dev_info_t;
-
 struct linear_private_data
 {
 	struct rcu_head		rcu;
 	sector_t		array_sectors;
-	dev_info_t		disks[0];
+	struct dev_info		disks[0];
 };