Merge branch 'nfp-flow-dissector-layer'

Pieter Jansen van Vuuren says:

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nfp: fix layer calculation and flow dissector use

Previously when calculating the supported key layers MPLS, IPv4/6
TTL and TOS were not considered. Formerly flow dissectors were referenced
without first checking that they are in use and correctly populated by TC.
Additionally this patch set fixes the incorrect use of mask field for vlan
matching.
====================

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