btrfs: send: get rid of the label and gotos at ensure_commit_roots_uptodate()

Now that there is a helper to commit the current transaction and we are
using it, there's no need for the label and goto statements at
ensure_commit_roots_uptodate(). So replace them with direct return
statements that call btrfs_commit_current_transaction().

Reviewed-by: Josef Bacik <[e-mail]>
Reviewed-by: Qu Wenruo <[e-mail]>
Signed-off-by: Filipe Manana <[e-mail]>
Reviewed-by: David Sterba <[e-mail]>
Signed-off-by: David Sterba <[e-mail]>

fs/btrfs/send.c

···
 	struct btrfs_root *root = sctx->parent_root;
 
 	if (root && root->node != root->commit_root)
-		goto commit_trans;
+		return btrfs_commit_current_transaction(root);
 
 	for (int i = 0; i < sctx->clone_roots_cnt; i++) {
 		root = sctx->clone_roots[i].root;
 		if (root->node != root->commit_root)
-			goto commit_trans;
+			return btrfs_commit_current_transaction(root);
 	}
 
 	return 0;
-
-commit_trans:
-	/*
-	 * Use the first root we found. We could use any but that would cause
-	 * an unnecessary update of the root's item in the root tree when
-	 * committing the transaction if that root wasn't changed before.
-	 */
-	return btrfs_commit_current_transaction(root);
 }
 
 /*