Various PMac PCI patches

[Ryan Nielsen]

Michel Lanners wrote:
> 2. I've hacked pmac_pcibios_fixup with a few changes:
> 
> - It now checks for PCI buses other than the first one, on all bridges.
> This should help on the 7x00/8x00 machines (bandit and chaos host
> bridges) as well as on the 9x00 (two bandit bridges; second bus would
> be invisible up to now). If anyone has a 9x00, can  you test if this
> works? For me it only detects one of two devices on bus 1....
 
It detects two out of two on mi 9600.

isa_io_base is set to the address of bus 0 !
so inl() and friends use wrong address for cards on bus 1.

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