net/i40e: add FDIR NVGRE parameter check
net/i40e: add FDIR NVGRE parameter check

Add mask parameter check to nvgre parser for flow API.

Fixes: 30965ca34127 ("net/i40e: add NVGRE flow parsing")
Cc: stable@dpdk.org

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

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