usb: remove redundant dependency on USB_SUPPORT

The whole Kconfig entries of the USB subsystem are surrounded with
"if USB_SUPPORT" ... "endif", so CONFIG_USB_SUPPORT=y is surely met
when these two Kconfig options are visible.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/usb/dwc3/Kconfig b/drivers/usb/dwc3/Kconfig
index a64ce1c..b97cde7 100644
--- a/drivers/usb/dwc3/Kconfig
+++ b/drivers/usb/dwc3/Kconfig
@@ -1,7 +1,7 @@
 config USB_DWC3
 	tristate "DesignWare USB3 DRD Core Support"
 	depends on (USB || USB_GADGET) && HAS_DMA
-	select USB_XHCI_PLATFORM if USB_SUPPORT && USB_XHCI_HCD
+	select USB_XHCI_PLATFORM if 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.