usb: dwc3: Fix the dwc3 dependency

The warning shown up when ran with randconfig,

warning: (USB_DWC3) selects USB_XHCI_PLATFORM which has unmet direct dependencies (USB_SUPPORT && USB_XHCI_HCD)

Signed-off-by: joseph daniel <josephdanielwalter@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/usb/dwc3/Kconfig b/drivers/usb/dwc3/Kconfig
index d8f741f..d13c60f4 100644
--- a/drivers/usb/dwc3/Kconfig
+++ b/drivers/usb/dwc3/Kconfig
@@ -4,7 +4,7 @@
 	select USB_OTG_UTILS
 	select USB_GADGET_DUALSPEED
 	select USB_GADGET_SUPERSPEED
-	select USB_XHCI_PLATFORM
+	select USB_XHCI_PLATFORM if USB_SUPPORT && USB_XHCI_HCD
 	help
 	  Say Y or M here if your system has a Dual Role SuperSpeed
 	  USB controller based on the DesignWare USB3 IP Core.