UPSTREAM: PCI: Add devm_request_pci_bus_resources()

UPSTREAM: PCI: Add devm_request_pci_bus_resources()

Several host bridge drivers iterate through the list of bridge windows to
request resources.  Several others don't request the window resources at
all.

Add a devm_request_pci_bus_resources() interface to make it easier for
drivers to request all the window resources.  Export to GPL modules (from
Arnd Bergmann <arnd@arndb.de>).

Change-Id: I4b89f0739d66d6027bfd2a01e9e93f5218ade617
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Huang, Tao <huangtao@rock-chips.com>
(cherry picked from commit 950334bcf17a6ab55ce13d3bdf050f7b429320d5)