kernel: mark kmod-usb-phy-nop as hidden to avoid building it where it is not needed

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 40470

package/kernel/linux/modules/usb.mk

@@ -102,6 +102,7 @@ $(eval $(call KernelPackage,usb-musb-tusb6010))
 define KernelPackage/usb-phy-nop
   TITLE:=Support for USB NOP transceiver
   KCONFIG:=CONFIG_NOP_USB_XCEIV
+  HIDDEN:=1
 ifneq ($(wildcard $(LINUX_DIR)/drivers/usb/phy/phy-generic.ko),)
   FILES:=$(LINUX_DIR)/drivers/usb/phy/phy-generic.ko
   AUTOLOAD:=$(call AutoLoad,43,phy-generic)