net/bnxt: fix redundant MAC address check

net/bnxt: fix redundant MAC address check

filter->mac_index is used to check, if a same mac is
already programmed. Hence, filter->dflt member is not
needed which is also used for mac addr redundancy check.

This patch fixes it by moving mac_index based redundant
check from bnxt_mac_addr_add_op to bnxt_add_mac_filter

Fixes: 6118503d8071 ("net/bnxt: fix VLAN filtering")
Cc: stable@dpdk.org
Signed-off-by: Venkat Duvvuru <venkatkumar.duvvuru@broadcom.com>
Reviewed-by: Somnath Kotur <somnath.kotur@broadcom.com>
Reviewed-by: Ajit Khaparde <ajit.khaparde@broadcom.com>