board/[A-Za-c]*: Remove obsolete references to CONFIG_COMMANDS

board/MAI/AmigaOneG3SE/cmd_boota.c

board/MAI/menu/cmd_menu.c

board/Marvell/common/serial.c

board/alaska/alaska.c

board/altera/dk1c20/dk1c20.c

board/amirix/ap1000/serial.c

board/at91rm9200dk/at91rm9200dk.c

board/atc/atc.c

board/atc/ti113x.c

board/atmel/atstk1000/eth.c

board/bc3450/cmd_bc3450.c

board/bf537-stamp/bf537-stamp.c

board/bf537-stamp/ether_bf537.c

board/bf537-stamp/nand.c

board/c2mon/pcmcia.c

board/cmc_pu2/cmc_pu2.c

board/cogent/serial.c

board/cpc45/cpc45.c

board/cpc45/pd67290.c

board/cpu86/cpu86.c