[dts] [PATCH v2]test_plans: add cvl_advanced_rss_gtpu_test_plan.rst

[Tu, Lijuan]

> Subject: [dts] [PATCH v2]test_plans: add cvl_advanced_rss_gtpu_test_plan.rst
> 
> Enable RSS for GTP-U Up/Down Link sperately.
> RSS based on 5 Tuple ( Src IP Address/Dst IP Address/Src Port/Dst Port/Protocol)
> using the DPDK RTE_FLOW rules for GTP-U packets).
> Support ipv4+ipv6 combination of GTP packet:
> Symmetric hash by rte_flow RSS action for GTP-U packets.
> simple-xor RSS support GTP-U.
> 
> Signed-off-by: Peng Yuan <yuan.peng at intel.com>

Applied