Add cli_ prefix to readline functions

board/ait/cam_enc_4xx/cam_enc_4xx.c

board/amcc/yucca/cmd_yucca.c

board/eltec/elppc/misc.c

board/eltec/mhpc/mhpc.c

board/hymod/hymod.c

board/hymod/input.c

common/cli_hush.c

common/cli_readline.c

common/cli_simple.c

common/cmd_bedbug.c

common/cmd_dcr.c

common/cmd_i2c.c

common/cmd_mem.c

common/cmd_nvedit.c

common/cmd_pci.c

common/menu.c

drivers/ddr/fsl/interactive.c

include/cli.h