fixed IO address decoding for FPGA

cMIPS/altera/tb_cMIPS.vhd

cMIPS/bin/elf2mif.sh

cMIPS/include/syn_start.s

cMIPS/tests/mac_kbd_lcd.c

cMIPS/vhdl/aux.vhd

cMIPS/vhdl/core.vhd

cMIPS/vhdl/io.vhd

cMIPS/vhdl/packageMemory.vhd

cMIPS/vhdl/tb_cMIPS.vhd

cMIPS/vhdl/uart.vhd