parisc: lba_pci: Use pci_host_resource_survey()

This replaces a whole bunch of custom resource claiming code that was
done at pcibios_fixup_bus() time. We now do a single call to
pci_host_resource_survey() to perform all the standard claiming.

Hopefully I didn't miss some subtle difference and things will still
work fine...

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>