[coreboot] [PATCH] 1/3 virtual LDN for PNP

[Rudolf Marek]

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Hello,

Some SIO/PNP devices are abusing register 0x30 for multiple LDN enables, like
mine W83627EHF.

This patch introduces a concept of virtual LDN. Each virtual LDN is unique, but
maps to original LDN and bit position in register 0x30.

VirtualLDN = origLDN[7:0] | bitpos[10:8]

For example mine GPIO5 device is on LDN 0x9 and bit position 3 -> virtualLDN is
0x309.

As the nice effect one can have now in Config.lb right enable:

device pnp 2e.309 on #GPIO5 on
end

Plus normal resources if it is a GAME port for example:

device pnp 2e.107 on #GAME on
io 0x60 = 0x201
end

This patch just modifies the core PNP subsystem, other patches will follow.

Signed-off-by: Rudolf Marek

Thanks,

Rudolf
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