btrfs: get fs_info from trans in btrfs_run_dev_stats

We can read fs_info from the transaction and can drop it from the
parameters.

Signed-off-by: David Sterba <dsterba@suse.com>
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index cc326d9..1e3d8d9 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -1094,7 +1094,7 @@ static noinline int commit_cowonly_roots(struct btrfs_trans_handle *trans)
 	if (ret)
 		return ret;
 
-	ret = btrfs_run_dev_stats(trans, fs_info);
+	ret = btrfs_run_dev_stats(trans);
 	if (ret)
 		return ret;
 	ret = btrfs_run_dev_replace(trans, fs_info);