net/mlx5: support TOS and TTL fields on E-Switch

net/mlx5: support TOS and TTL fields on E-Switch

This patch adds the type-of-service and time-to-live IP header
fields support on E-Switch. There match pattern for both fields
with masking is added. Also these fields can be set for VXLAN
tunnel encapsulation header.

This issue is critical for some Open VSwitch configuration
on overlayed (tunneled) networks, where the tos field can be
inherited from outer header to inner header.

Signed-off-by: Viacheslav Ovsiienko <viacheslavo@mellanox.com>
Acked-by: Shahaf Shuler <shahafs@mellanox.com>