Merge branch 'dsa-net'

Andrew Lunn says:

====================
DSA tagging mismatches

The second patch is a fix, which should be applied to -rc. It is
possible to get a DSA configuration which does not work. The patch
stops this happening.

The first patch detects this situation, and errors out the probe of
DSA, making it more obvious something is wrong. It is not required to
apply it -rc.

v2 fixes the use case pointed out by Florian, that a switch driver
may use DSA_TAG_PROTO_NONE which the patch did not correctly handle.
====================

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