net/ixgbe: support packet type with NEON

net/ixgbe: support packet type with NEON

Ptype parse is missing in aarch64 vector PMD. It makes packet type info
provided by NIC get lost, thus requires extra CPU cycles to do this.
Add the parse process to utilize NIC hardware capability.

In test with l3fwd (removed port conf DEV_RX_OFFLOAD_CHECKSUM),
observed over 3% performance gain.

Fixes: b20971b6cca0 ("net/ixgbe: implement vector driver for ARM")
Cc: stable@dpdk.org
Signed-off-by: Ruifeng Wang <ruifeng.wang@arm.com>
Reviewed-by: Gavin Hu <gavin.hu@arm.com>
Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>