usb: dwc2: gadget: Remove unnecessary code

This chunk is not needed here. There is no functionality
depend on this, so if no-op, I think we do not need to have
this interrupt unmasked.
Tested-by: NJohn Keeping <john@metanate.com>
Signed-off-by: NVardan Mikayelyan <mvardan@synopsys.com>
Signed-off-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

drivers/usb/dwc2/gadget.c

@@ -657,14 +657,6 @@ static void dwc2_hsotg_start_req(struct dwc2_hsotg *hsotg,
 		dwc2_hsotg_write_fifo(hsotg, hs_ep, hs_req);
 	}
 
-	/*
-	 * clear the INTknTXFEmpMsk when we start request, more as a aide
-	 * to debugging to see what is going on.
-	 */
-	if (dir_in)
-		dwc2_writel(DIEPMSK_INTKNTXFEMPMSK,
-		       hsotg->regs + DIEPINT(index));
-
 	/*
 	 * Note, trying to clear the NAK here causes problems with transmit
 	 * on the S3C6400 ending up with the TXFIFO becoming full.