[U-Boot] Enable Autoboot

[Liu Dave-R63238]

> I have bsp from freescale for mpc8313erdb evalutaion board. the board
> is up and running no issues with it as of now.
> But in u-boot the autoboot option is not enabled and I would like to
> have enabled. I believe that I need to do some changes in the u-boot
> source code.
> Could anyone please point me towards the way that how I can enable the
> autoboot option? where the sources and CONFIG option for autoboot is
> located ? ? ?

Have a grep 'BOOTDELAY' in the README, and have a look the
doc/README.autoboot.

Thanks, Dave