Defines starting with `n' in iokit/Drivers/network/drvPPCUniN

• NETWORK_BUFSIZE iokit/Drivers/network/drvPPCUniN/UniNEnetRegisters.h:40
• NUM_RX_DESC iokit/Drivers/network/drvPPCUniN/UniNEnet.h:59
• NUM_TX_DESC iokit/Drivers/network/drvPPCUniN/UniNEnet.h:65