[U-Boot] davinci: lowlevel_init for davinci boards

[Paulraj, Sandeep]

> I am quite unsure about the role of the RBL, too. I have assumed that
> the setup to access the AEMIF interface is provided only by setting the
> AECFG pins and the role of RBL is to copy the UBL into IRAM and start it.
> 
> However, the RBL could initialize the processor in some way I do not
> know before loading the UBL and then I could get further problems due to
> a missing or wrong initialization that I have not seen in UBL. Do you
> know if the RBL is responsible to some further initialization before
> loading the UBL ?

The RBL does some PINMUX init that is required for AEMIF


Regards,
Sandeep