microblaze/PCI: Remove unused device tree parsing for a host bridge resources

Remove unused pci_process_bridge_OF_ranges function, used to
parse the "ranges" property of a PCI host device.

Signed-off-by: Thippeswamy Havalige <thippeswamy.havalige@amd.com>
Link: https://lore.kernel.org/r/20221025065214.4663-6-thippeswamy.havalige@amd.com


Signed-off-by: Michal Simek <michal.simek@amd.com>