Ramaxel roadmap for 22.03

[Yanling Song]

Please find below Ramaxel roadmap for v22.03 release:

Introduce SPNIC driver for Ramaxel's SPNxx serial NIC cards into DPDK
22.03. 
Ramaxel Memory Technology is a company which supply a lot of
electric products in several fields: storage, communication, PCB...
SPNxxx is a serial PCIE interface NIC cards:
SPN110: 2 PORTs *25G
SPN120: 4 PORTs *25G
SPN130: 2 PORTs *100G

The following is main features of SPNxxx NIC cards:
- TSO
- LRO
- Flow control
- SR-IOV(Partially supported)
- VLAN offload
- VLAN filter
- CRC offload
- Promiscuous mode
- RSS