btrfs: call btrfs_create_pending_block_groups unconditionally

The first thing we do is loop through the list, this

if (!list_empty())
	btrfs_create_pending_block_groups();

thing is just wasted space.
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/extent-tree.c

@@ -3013,7 +3013,6 @@ int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
 	}
 
 	if (run_all) {
-		if (!list_empty(&trans->new_bgs))
 		btrfs_create_pending_block_groups(trans);
 
 		spin_lock(&delayed_refs->lock);

fs/btrfs/transaction.c

@@ -845,7 +845,6 @@ static int __btrfs_end_transaction(struct btrfs_trans_handle *trans,
 	btrfs_trans_release_metadata(trans);
 	trans->block_rsv = NULL;
 
-	if (!list_empty(&trans->new_bgs))
 	btrfs_create_pending_block_groups(trans);
 
 	btrfs_trans_release_chunk_metadata(trans);
@@ -1943,7 +1942,6 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans)
 	cur_trans->delayed_refs.flushing = 1;
 	smp_wmb();
 
-	if (!list_empty(&trans->new_bgs))
 	btrfs_create_pending_block_groups(trans);
 
 	ret = btrfs_run_delayed_refs(trans, 0);