net/ice: fix flow rule checking
net/ice: fix flow rule checking

Add empty item into the pattern mapping list when checking the ptype is
supported or not, since we do support the NUll pattern for rte flow in
ice pmd.

Fixes: 68b6240ee9f0 ("net/ice: refactor packet type parsing")

Signed-off-by: Jeff Guo <62aa901f8680899d1e8b3d9b45cf4843c2976e1c@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