[U-Boot] i.MX6: mx6qsabrelite: allow use with Freescale 2.6.38 kernels

[Marek Vasut]

> This series of patches is needed to allow main-line U-Boot to be used
> with Freescale's Linux 2.6.38 non-DT kernel releases.
> 
> These releases currently require at least the machine type and
> revision atag entries and are configured to load boot scripts from
> the ext3 filesystem.
> 

Almost looks good, just minor tweaks needed. Thanks for your good work so far, 
keep it up !

M