HW seems to populate the cfa code in the Rx descriptor even
if an explicit flow rule is not configured via application as
there might be a default rule configured in HW even for promisc
mode.
Fixes: 94eb699bc82e ("net/bnxt: support flow mark action")
Signed-off-by: Somnath Kotur <somnath.kotur@broadcom.com>
Reviewed-by: Ajit Khaparde <ajit.khaparde@broadcom.com>