fs/fs_fsync:Fix the expected error of socket,fifo and pipe returning error in fsync case

drivers/pipes/pipe_common.c

@@ -877,6 +877,10 @@ int pipecommon_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
         }
         break;
 
+      case BIOC_FLUSH:
+        ret = -EINVAL;
+        break;
+
       default:
         ret = -ENOTTY;
         break;

net/local/local_sockif.c

@@ -847,6 +847,9 @@ static int local_ioctl(FAR struct socket *psock, int cmd, unsigned long arg)
             ret = -ENOTCONN;
           }
         break;
+      case BIOC_FLUSH:
+        ret = -EINVAL;
+        break;
       default:
         ret = -ENOTTY;
         break;