As return specific error code on PCS read-after-write fails. And add SW error code to report for FSI on failure. Bug 3792855 Change-Id: I51b8a088247d98621750af7bb42100a078c083c2 Signed-off-by: Om Prakash Singh <omp@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/kernel/nvethernetrm/+/2781195 Tested-by: mobile promotions <svcmobile_promotions@nvidia.com> Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>