btrfs: cover more error codes in btrfs_decode_error

Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>

fs/btrfs/super.c

@@ -81,6 +81,12 @@ static const char *btrfs_decode_error(int errno)
 	case -EEXIST:
 		errstr = "Object already exists";
 		break;
+	case -ENOSPC:
+		errstr = "No space left";
+		break;
+	case -ENOENT:
+		errstr = "No such entry";
+		break;
 	}
 
 	return errstr;