BBB: cpuio.c: Set devInit() to return 0 by default
BBB: cpuio.c: Set devInit() to return 0 by default

devInit() is not currently being used.  With the current state of uMon, all
initializations unique to the AM335x are performed in initCPUio() for now

jrcatbagan/umon,jrcatbagan/umon,jrcatbagan/umon