Update MPC8544 DS PCI memory map

Update MPC8544 DS PCI memory map

The PCIe bus that the ULI M1575 is connected to has no possible way of
needing more than the fixed amount of IO & Memory space needed by the ULI.

So make it use far less IO & memory space and have it use the shared LAW.  This
free's up a LAW for PCIe1 IO space.  Also reduce the amount of IO space needed
by each bus.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>