ext2: Fix a typo in comment

Fix a typo in ext2_get_blocks comment.
Signed-off-by: Liu Xiang <liu.xiang6@zte.com.cn>
Signed-off-by: Jan Kara <jack@suse.cz>

fs/ext2/inode.c

@@ -717,7 +717,7 @@ static int ext2_get_blocks(struct inode *inode,
 	/* the number of blocks need to allocate for [d,t]indirect blocks */
 	indirect_blks = (chain + depth) - partial - 1;
 	/*
-	 * Next look up the indirect map to count the totoal number of
+	 * Next look up the indirect map to count the total number of
 	 * direct blocks to allocate for this branch.
 	 */
 	count = ext2_blks_to_allocate(partial, indirect_blks,