Add waiting for receiving Ethernet gadget state on the Windows host
side before dropping pullup, but keep it for debug.
Signed-off-by: Vitaly Kuzmichev <vkuzmichev@mvista.com>
Port USB gadget RNDIS protocol support from linux-2.6.26
(.27 gadget stack actually has composite drivers).
Signed-off-by: Vitaly Kuzmichev <vkuzmichev@mvista.com>