net/bnxt: fix freeing filters on flow creation failure

net/bnxt: fix freeing filters on flow creation failure

This patch does following things:
1. Added a wrapper function bnxt_clear_one_vnic_filter()
   for destroying the filters in hw. This will avoid duplicate
   code in many places.
2. When flow create fails due to an already existing mark id
   for the new flow id created, fixed to destroy the hw
   filter created.
3. Re-arranged code to move a log and list update to right place.

Fixes: 9db66782bd06 ("net/bnxt: fix supporting zero mark ID with RSS action")
Fixes: 5ef3b79fdfe6 ("net/bnxt: support flow filter ops")
Cc: stable@dpdk.org
Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Reviewed-by: Somnath Kotur <somnath.kotur@broadcom.com>
Reviewed-by: Ajit Khaparde <ajit.khaparde@broadcom.com>