ext4: fix ext4_get_blocks references

ext4_get_blocks got renamed to ext4_map_blocks, but left stale
comments and a prototype littered around.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index fbb3947..9ca3637 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -465,7 +465,7 @@
 };
 
 /*
- * Flags used by ext4_get_blocks()
+ * Flags used by ext4_map_blocks()
  */
 	/* Allocate any needed blocks and/or convert an unitialized
 	   extent to be an initialized ext4 */
@@ -1954,9 +1954,6 @@
 			  ssize_t len);
 extern int ext4_map_blocks(handle_t *handle, struct inode *inode,
 			   struct ext4_map_blocks *map, int flags);
-extern int ext4_get_blocks(handle_t *handle, struct inode *inode,
-			   sector_t block, unsigned int max_blocks,
-			   struct buffer_head *bh, int flags);
 extern int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
 			__u64 start, __u64 len);
 /* move_extent.c */