common/sfc_efx/base: fix MPORT related byte order handling

common/sfc_efx/base: fix MPORT related byte order handling

MPORT values derived by helper functions are little-endian.
At the same time, MCDIs which consume these values perform
one more host-order to little-endian conversion internally.

Fix the helper functions to return host-order MPORT values.

Fixes: 370ed675a952 ("common/sfc_efx/base: support setting PPORT in match spec")
Fixes: bb024542fffd ("common/sfc_efx/base: add API for adding action drop")
Fixes: 097058033f03 ("common/sfc_efx/base: add API to get mport of PF/VF")
Cc: stable@dpdk.org
Reported-by: Andy Moreton <amoreton@xilinx.com>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
Reviewed-by: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>
Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>