lan7xxx: Require phylib

The lan75xx and lan78xx drivers need to drive their phy via the generic
phylib framework. Let's reflect that dependency in Kconfig, so that we
don't get build errors when phylib does not get selected.

Signed-off-by: Alexander Graf <agraf@suse.de>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>

drivers/usb/eth/Kconfig

@@ -23,6 +23,7 @@ config USB_ETHER_ASIX88179
 config USB_ETHER_LAN75XX
 	bool "Microchip LAN75XX support"
 	depends on USB_HOST_ETHER
+	depends on PHYLIB
 	---help---
 	  Say Y here if you would like to support Microchip LAN75XX Hi-Speed
 	  USB 2.0 to 10/100/1000 Gigabit Ethernet controller.
@@ -32,6 +33,7 @@ config USB_ETHER_LAN75XX
 config USB_ETHER_LAN78XX
 	bool "Microchip LAN78XX support"
 	depends on USB_HOST_ETHER
+	depends on PHYLIB
 	---help---
 	  Say Y here if you would like to support Microchip LAN78XX USB 3.1
 	  Gen 1 to 10/100/1000 Gigabit Ethernet controller.