net/bnxt: fix device capability reporting

net/bnxt: fix device capability reporting

1. Added two functions bnxt_get_tx_port_offloads() and
   bnxt_get_rx_port_offloads() to report the device
   tx/rx offload capabilities to the application.
2. This avoids few duplicate code in the driver and make
   VF-rep capability the same as VF.
3. This will help in selectively reporting offload capabilities
   based on FW support.

Fixes: 0a6d2a720078 ("net/bnxt: get device infos")
Cc: stable@dpdk.org
Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Reviewed-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
Reviewed-by: Somnath Kotur <somnath.kotur@broadcom.com>