Merge branch 'arcnet-features'

Michael Grzeschik says:

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arcnet: Collection of latest features

Here we sum up the latest features to improve the arcnet framework. One
patch is used to get feedback from the transfer queue about failed xfers
by adding the err_skb message queue. Beside that we improve the
backplane status that can be read by the PCI-based cards and offer that
status via an extra sysfs attribute. In the last patch we add another
card type PCIFB2.
====================

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