net/bnxt: remove unnecessary structure variable

net/bnxt: remove unnecessary structure variable

This change could help in reducing the size of bnxt PMD private
data structure by converting a uint8_t variable to use bit map flag.

Fixes: 5cd0e2889c43 ("net/bnxt: support NIC Partitioning")
Cc: stable@dpdk.org
Reviewed-by: Santoshkumar Karanappa Rastapur <santosh.rastapur@broadcom.com>
Reviewed-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
Signed-off-by: Somnath Kotur <somnath.kotur@broadcom.com>
Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>