usb: dwc2: gadget: dont warn if endpoint is not enabled

The warning is probably good but it has false positives in both dma and non-dma
cases. So its not very helpful in either.

Tested-by: Robert Baldyga <r.baldyga@samsung.com>
Acked-by: Paul Zimmerman <paulz@synopsys.com>
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/dwc2/gadget.c

@@ -678,7 +678,7 @@ static void s3c_hsotg_start_req(struct dwc2_hsotg *hsotg,
 
 	/* check ep is enabled */
 	if (!(readl(hsotg->regs + epctrl_reg) & DXEPCTL_EPENA))
-		dev_warn(hsotg->dev,
+		dev_dbg(hsotg->dev,
 			 "ep%d: failed to become enabled (DXEPCTL=0x%08x)?\n",
 			 index, readl(hsotg->regs + epctrl_reg));