net/bnxt: refactor VFR port clean up

net/bnxt: refactor VFR port clean up

When parent VF or PF ports are cleaned up, the child VF representor
ports also need to be cleaned up. If not cleaned up, then deleting
the parent VF shall result in not cleaning up the hardware rules and
updating the firmware of VFR removal. The issue can occur even when
application is exited without deleting VFR ports.

Signed-off-by: Kishore Padmanabha <kishore.padmanabha@broadcom.com>
Reviewed-by: Mike Baucom <michael.baucom@broadcom.com>
Reviewed-by: Shahaji Bhosle <sbhosle@broadcom.com>
Reviewed-by: Ajit Khaparde <ajit.khaparde@broadcom.com>