examples/l3fwd-power: add --parse-ptype option
examples/l3fwd-power: add --parse-ptype option

To support those devices that do not provide packet type info when
receiving packets, add a new option, --parse-ptype, to analyze
packet type in the Rx callback.

Signed-off-by: Jianfeng Tan <4339d9ba3a87a0d192e405945005ff86667f7b0c@intel.com>
Tested-by: Lei Yao <c2488030b123895536efc05beedc614797f7d73a@intel.com>

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