2. Update Dhcp4 and Mtftp4 driver to adopt the combined UdpIo. 3. Clean up coding style problems in combined IpIoLib/NetLib. Update Tcp4 and Udp4 to adopt the changes. git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9382 6f19259b-4bc3-4df7-8a09-765794883524