tf700t: allow ethernet via usb0

When connecting to a android phone with usb tethering, the connection
appears as usb0, not eth0.

Change-Id: I558abdc93e35c485a564af556cc634dd4fb7586e

Conflicts:
	overlay/frameworks/base/core/res/res/values/config.xml
	prebuilt/ramdisk/init.picasso_mf.rc