btrfs: make cow_file_range take btrfs_inode

All its children functions take btrfs_inode so convert it to taking
btrfs_inode.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
1 file changed