net/ice/base: fix PPPoE-IPv6 dummy packet
net/ice/base: fix PPPoE-IPv6 dummy packet

The dummy packet for pppoe-ipv6 has an error, we should
use 0x3b for next header in ipv6 header in the dummy packet,
or some case can not be download, such as:

"eth / pppoes seid is 3 / pppoe_proto_id is 0x0057 /
end actions vf id 1 / end"

Fixes: 55d61fb27a5e ("net/ice/base: add PPPoE IPv6 dummy packet")

Signed-off-by: Wei Zhao <55941fd0e75edbdf274af2cfac8f147525678f08@intel.com>
Tested-by: Nannan Lu <0c1a076f2908fa2c8d9cbb6834a89a8ada7e8ef4@intel.com>
Acked-by: Qi Zhang <9e9e58ffa71a29bb7b87766b362515be648fcbe0@intel.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk