net/bnxt: fix error checking of FW commands

net/bnxt: fix error checking of FW commands

HWRM_CHECK_RESULT() checks the return value of HWRM command and returns
in case the command fails. There is no need of return value check after
HWRM_CHECK_RESULT().

Fixes: 49947a13ba9e ("net/bnxt: support Tx loopback, set VF MAC and queues drop")
Cc: stable@dpdk.org
Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Reviewed-by: Lance Richardson <lance.richardson@broadcom.com>
Reviewed-by: Ajit Khaparde <ajit.khaparde@broadcom.com>