common/sfc_efx/base: support alternative MAE match fields

common/sfc_efx/base: support alternative MAE match fields

If MAE slice is configured without conntrack support, outer
rules must match on IP SRC/DST. This isn't reported clearly
by the FW because IPv4 and IPv6 have separate SRC/DST pairs.
The FW reports status ALWAYS for all these four fields, and
having an all-zeros mask for either field prevents the spec
from being certified by the existing spec validation method.

Extend the spec validation to take the "alternative" fields
into account so that legitimate specs don't get turned down.

Fixes: ed15d7f8e064 ("common/sfc_efx/base: validate and compare outer match specs")
Cc: stable@dpdk.org
Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Reviewed-by: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>