cpu/m*: Remove obsolete references to CONFIG_COMMANDS

cpu/mcf52x2/fec.c

cpu/microblaze/cache.c

cpu/microblaze/interrupts.c

cpu/mips/au1x00_eth.c

cpu/mpc5xx/interrupts.c

cpu/mpc5xx/traps.c

cpu/mpc5xxx/cpu_init.c

cpu/mpc5xxx/fec.c

cpu/mpc5xxx/interrupts.c

cpu/mpc5xxx/traps.c

cpu/mpc8220/cpu_init.c

cpu/mpc8220/fec.c

cpu/mpc8220/traps.c

cpu/mpc824x/traps.c

cpu/mpc8260/bedbug_603e.c

cpu/mpc8260/ether_fcc.c

cpu/mpc8260/ether_scc.c

cpu/mpc8260/interrupts.c

cpu/mpc8260/kgdb.S

cpu/mpc8260/traps.c