[v4] net/mlx5: support matching optional fields of GRE

[Ferruh Yigit]

On 2/25/2022 1:14 AM, Sean Zhang wrote:
> This patch adds matching on the optional fields (checksum/key/sequence)
> of GRE header. The matching on checksum and sequence fields requests
> support from rdma-core with the capability of misc5 and tunnel_header 0-3.
> 
> For patterns without checksum and sequence specified, keep using misc for
> matching as before, but for patterns with checksum or sequence, validate
> capability first and then use misc5 for the matching.
> 
> Signed-off-by: Sean Zhang <xiazhang at nvidia.com>
> Acked-by: Viacheslav Ovsiienko <viacheslavo at nvidia.com>
> 

doc is missing:

./devtools/check-doc-vs-code.sh
rte_flow doc out of sync for mlx5
         item gre_option

I can add in next-net while merging, if this is the only issue.