Remove HCCStar Addressing register from writable register map

HCCStar Addressing register (17) is currently included in the hccWriteMap. During configuration, StarChips::writeRegisters loops over hccWriteMap and writes 0x00000000 to the Addressing register. HCC ID could be accidentally overwritten if the lower 24 bits of the Addressing register on the front end are also zeros, either because the chip serial number is never loaded onto register 17 or the front end is an emulator with default register values.