Btrfs: fix alignment in declaration and prototype of btrfs_get_extent

This fixes btrfs_get_extent to be consistent with our existing
declaration style.

Note: For the record, indentation styles that are accepted are both,
aligning under the opening ( and tab or double tab indentation on the
next line.  Preferrably not spliting the type or long expressions in the
argument lists.

Signed-off-by: Liu Bo <bo.liu@linux.alibaba.com>
[ add note ]
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/ctree.h

@@ -3178,8 +3178,8 @@ void __cold btrfs_destroy_cachep(void);
 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
 			 struct btrfs_root *root, int *was_new);
 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
-		struct page *page, size_t pg_offset,
-		u64 start, u64 end, int create);
+				    struct page *page, size_t pg_offset,
+				    u64 start, u64 end, int create);
 int btrfs_update_inode(struct btrfs_trans_handle *trans,
 			      struct btrfs_root *root,
 			      struct inode *inode);

fs/btrfs/inode.c

@@ -6772,9 +6772,9 @@ static noinline int uncompress_inline(struct btrfs_path *path,
  * This also copies inline extents directly into the page.
  */
 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
-		struct page *page,
-	    size_t pg_offset, u64 start, u64 len,
-		int create)
+				    struct page *page,
+				    size_t pg_offset, u64 start, u64 len,
+				    int create)
 {
 	struct btrfs_fs_info *fs_info = inode->root->fs_info;
 	int ret;