Updated uBoot commands, no longer 'mmcinit'

If using Ubuntu ARM 12.04 with a BeagleBoard C3 that has a recent uBoot version on it then

the following suggested command will not work:

setenv bootcmd 'mmc init;fatload mmc 0 0x82000000 boot.scr;source 0x82000000';

  setenv autostart yes; saveenv; boot

Instead you need to convert the "init" to "dev 0", so that it is:

setenv bootcmd 'mmc dev 0;fatload mmc 0 0x82000000 boot.scr;source 0x82000000'; 

  setenv autostart yes; saveenv; boot

This is the new way to set the mmc device.