net/bnxt: reset L2 filter id once filter is freed

The fw_l2_filter_id for a ntuple filter is needed only for the lifetime
of the ntuple filter. Once the filter is free, reset the field.
The associated l2_filter will be freed as a part of its own cleanup.

Fixes: 5ef3b79fdfe6 ("net/bnxt: support flow filter ops")
Cc: stable@dpdk.org

Signed-off-by: Ajit Khaparde <ajit.khaparde@broadcom.com>

drivers/net/bnxt/bnxt_hwrm.c

@@ -3696,6 +3696,7 @@ int bnxt_hwrm_clear_ntuple_filter(struct bnxt *bp,
 	HWRM_UNLOCK();
 
 	filter->fw_ntuple_filter_id = -1;
+	filter->fw_l2_filter_id = UINT64_MAX;
 
 	return 0;
 }