[PATCH] powerpc/85xx: Add P1024rdb dts support

[Tang Yuantian-B29983]

> >
> > P1020rdb has vitesse-7385 switch.
> 
> I'm talking about the SoC, not the board.
> 
> > fsl/p1020si-post.dtsi can be used for both boards.
> 
> What are you basing this on?  Has someone looked over both manuals in
> detail and concluded that every device described is 100% compatible?
> 

I ported this from the dts in kernel 2.6.35. 
I found they are 100% compatible from dts point of view.

Regards,
Yuantian