net/iavf: fix conflicting RSS combination rules

net/iavf: fix conflicting RSS combination rules

Currently, when use 'flow' command to create a rule with following
invalid RSS type combination, it can be created successfully.

Invalid RSS combinations list:
 - ETH_RSS_IPV4 | ETH_RSS_NONFRAG_IPV4_TCP
 - ETH_RSS_IPV6 | ETH_RSS_NONFRAG_IPV6_TCP

This patch adds these combinations in 'invalid_rss_comb' array to do
valid check, if the combination check failed, the rule will be created
unsuccessful.

Fixes: 91f27b2e39ab ("net/iavf: refactor RSS")
Cc: stable@dpdk.org
Signed-off-by: Murphy Yang <murphyx.yang@intel.com>
Acked-by: Jeff Guo <jia.guo@intel.com>