ext4: correct comments for ext4_free_blocks()

metadata is not parameter of ext4_free_blocks() any more.

Signed-off-by: Yongqiang Yang <[e-mail]>
Signed-off-by: "Theodore Ts'o" <[e-mail]>

fs/ext4/mballoc.c

···
  * @inode:		inode
  * @block:		start physical block to free
  * @count:		number of blocks to count
- * @metadata: 		Are these metadata blocks
+ * @flags:		flags used by ext4_free_blocks
  */
 void ext4_free_blocks(handle_t *handle, struct inode *inode,
 		      struct buffer_head *bh, ext4_fsblk_t block,