Merge branch 'xen-netfront-fixes'

Ross Lagerwall says:

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xen-netfront: Fix issues with commit f599c64fdf7d

Fix a couple of issues with commit f599c64fdf7d ("xen-netfront: Fix race
between device setup and open").
====================

Signed-off-by: David S. Miller <davem@davemloft.net>