usb: dwc3: Fix a repeated word checkpatch warning

Fixes a repeated word checkpatch warning in ep0.c by removing the repeated
'only' word.

Signed-off-by: Kushagra Verma <kushagra765@outlook.com>
Link: https://lore.kernel.org/r/HK0PR01MB2801996E815208393170010FF8D39@HK0PR01MB2801.apcprd01.prod.exchangelabs.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/dwc3/ep0.c

@@ -473,7 +473,7 @@ static int dwc3_ep0_handle_device(struct dwc3 *dwc,
 	case USB_DEVICE_REMOTE_WAKEUP:
 		break;
 	/*
-	 * 9.4.1 says only only for SS, in AddressState only for
+	 * 9.4.1 says only for SS, in AddressState only for
 	 * default control pipe
 	 */
 	case USB_DEVICE_U1_ENABLE: