PCI: rcar: Use inbound resources for setup

Now that the helpers provide the inbound resources in the host bridge
'dma_ranges' resource list, convert Renesas R-Car PCIe host bridge to
use the resource list to setup the inbound addresses.

Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Simon Horman <horms@verge.net.au>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>