net/mlx5: fix E-Switch egress mirror flow validation

net/mlx5: fix E-Switch egress mirror flow validation

The stored metadata in all registers C were lost in E-Switch egress
mirroring flows due to HW limitation. The register C0 keeps the
source vport index that also was used as one of the flow matcher.

While sample action and jump action (jump to table X) was in the
E-Switch egress flow, the flow in the next table X wasn't hit since
source vport value lost.

The modify actions after sample action should be applied to the packet
on normal path, not to the sampled packet. In order to support this
mlx5 PMD splits the flow into sub flows and jump action is engaged
implicitly, causing malfunction due to registers corruption.

This patch adds the validation the for E-Switch mirroring jump egress
flow, and checks for this hidden jump as well and reject the flows with
modify actions after sampling.

Fixes: 6a951567c159 ("net/mlx5: support E-Switch mirroring and jump in one flow")
Cc: stable@dpdk.org
Signed-off-by: Jiawei Wang <jiaweiw@nvidia.com>
Acked-by: Viacheslav Ovsiienko <viacheslavo@nvidia.com>