PCI: designware: Add config access-related pcie_host_ops for v3.65 hardware

DesignWare v3.65 hardware requires application space registers to be
configured to access the remote EP config space.

To support this, add rd_other_conf() and wr_other_conf() to pcie_host_ops.

[bhelgaas: changelog]
Signed-off-by: Murali Karicheri <[email protected]>
Signed-off-by: Bjorn Helgaas <[email protected]>
Reviewed-by: Pratyush Anand <[email protected]>
Acked-by: Mohit Kumar <[email protected]>
Acked-by: Jingoo Han <[email protected]>
Acked-by: Santosh Shilimkar <[email protected]>
CC: Russell King <[email protected]>
CC: Grant Likely <[email protected]>
CC: Rob Herring <[email protected]>
CC: Richard Zhu <[email protected]>
CC: Kishon Vijay Abraham I <[email protected]>
CC: Marek Vasut <[email protected]>
CC: Arnd Bergmann <[email protected]>
CC: Pawel Moll <[email protected]>
CC: Mark Rutland <[email protected]>
CC: Ian Campbell <[email protected]>
CC: Kumar Gala <[email protected]>
CC: Randy Dunlap <[email protected]>
CC: Grant Likely <[email protected]>

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