dm: Drop the block_dev_desc_t typedef

Use 'struct' instead of a typdef. Also since 'struct block_dev_desc' is long
and causes 80-column violations, rename it to struct blk_desc.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
diff --git a/include/reiserfs.h b/include/reiserfs.h
index 2d14d48..ffe4e46 100644
--- a/include/reiserfs.h
+++ b/include/reiserfs.h
@@ -63,7 +63,7 @@
 } reiserfs_error_t;
 
 
-extern void reiserfs_set_blk_dev(block_dev_desc_t *rbdd, disk_partition_t *info);
+void reiserfs_set_blk_dev(struct blk_desc *rbdd, disk_partition_t *info);
 extern int reiserfs_ls (char *dirname);
 extern int reiserfs_open (char *filename);
 extern int reiserfs_read (char *buf, unsigned len);