Staging: usbip: fix up build error

This dma flag is no longer in the kernel.  Remove it as it's pointless
and it causes a build error.

Cc: Endre Kollar <taxy443@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/usbip/stub_rx.c

@@ -457,8 +457,8 @@ static void masking_bogus_flags(struct urb *urb)
 	}
 
 	/* enforce simple/standard policy */
-	allowed = (URB_NO_TRANSFER_DMA_MAP | URB_NO_SETUP_DMA_MAP |
-			URB_NO_INTERRUPT | URB_DIR_MASK | URB_FREE_BUFFER);
+	allowed = (URB_NO_TRANSFER_DMA_MAP | URB_NO_INTERRUPT |
+		   URB_DIR_MASK | URB_FREE_BUFFER);
 	switch (xfertype) {
 	case USB_ENDPOINT_XFER_BULK:
 		if (is_out)