hv_netvsc: avoid retry on send during shutdown

hv_netvsc: avoid retry on send during shutdown

[ Commit 12f69661a49446840d742d8feb593ace022d9f66 upstream. ]

Change the initialization order so that the device is ready to transmit
(ie connect vsp is completed) before setting the internal reference
to the device with RCU.

This avoids any races on initialization and prevents retry issues
on shutdown.

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>