Gets rid of superfulous BTRFS_I() calls and prepare for converting
btrfs_run_delalloc_range to using btrfs_inode.
Signed-off-by: NNikolay Borisov <nborisov@suse.com>
Reviewed-by: NDavid Sterba <dsterba@suse.com>
Signed-off-by: NDavid Sterba <dsterba@suse.com>