ext[234]: remove unused argument for ext[234]_find_goal()

The argument chain for ext[234]_find_goal() is not used.  This patch removes
it and fixes comment as well.

Cc: <linux-ext4@vger.kernel.org>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c
index 7a1fcc9..03978ec 100644
--- a/fs/ext2/inode.c
+++ b/fs/ext2/inode.c
@@ -286,15 +286,12 @@
  *	ext2_find_goal - find a prefered place for allocation.
  *	@inode: owner
  *	@block:  block we want
- *	@chain:  chain of indirect blocks
  *	@partial: pointer to the last triple within a chain
  *
  *	Returns preferred place for a block (the goal).
  */
 
-static inline int ext2_find_goal(struct inode *inode,
-				 long block,
-				 Indirect chain[4],
+static inline int ext2_find_goal(struct inode *inode, long block,
 				 Indirect *partial)
 {
 	struct ext2_block_alloc_info *block_i;
@@ -638,7 +635,7 @@
 	if (S_ISREG(inode->i_mode) && (!ei->i_block_alloc_info))
 		ext2_init_block_alloc_info(inode);
 
-	goal = ext2_find_goal(inode, iblock, chain, partial);
+	goal = ext2_find_goal(inode, iblock, partial);
 
 	/* the number of blocks need to allocate for [d,t]indirect blocks */
 	indirect_blks = (chain + depth) - partial - 1;