[coreboot] fam10 resource can not allocated.

[Myles Watson]

> The patch has been tested and passed on fam10 board.
> I added an acked-by line to it, but I didn't review it. I didn't trace
> what happened in these patches and don't know what they mean. I just
> tested it. If it is appropriate,
> 
> Acked-by: Zheng Bao <zheng.bao at amd.com>

Since it was a simple patch and it fixed the problem, I'll take it :)

The IORESOURCE_BRIDGE flag helps the allocator know which resources belong
to bridges.

Rev 4403.

Thanks,
Myles