common/sfc_efx/base: fix indication of MAE encap support

common/sfc_efx/base: fix indication of MAE encap support

The indication fields in the MCDI response are individual
bits, but the current code mistakenly compares the larger
dword with 1. This breaks encap. type discovery. Fix that.

Fixes: 891408c45a63 ("common/sfc_efx/base: indicate MAE support for encapsulation")
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>