[coreboot] v3 patch: fix dtc to correctly parse @x values as hex, not decimal.

[Stefan Reinauer]

ron minnich wrote:
> I misunderstood the dts when I wrote this code. 
> The @ values are implicitly hex. Correctly emit hex constants for all cases, 
> including the pci a,b syntax. 
>
> Tested on dbe62. Note that before this patch goes in we need to change ALL 
> dts files to be hex. 
>
> Also a small buglet:  fix the strcmp on ioport to match 6, not 3, chars. 
>
> Signed-off-by: Ronald G. Minnich <rminnich at gmail.com>
>   
Acked-by: Stefan Reinauer <stepan at coresystems.de>

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