PCI: versatile: Add DT-based ARM Versatile PB PCIe host driver

This converts the Versatile PCI host code to a platform driver using the
commom DT parsing and setup.  The driver uses only an empty ARM
pci_sys_data struct and does not use pci_common_init_dev init function.
The old host code will be removed in a subsequent commit when Versatile is
completely converted to DT.

I've tested this on QEMU with the sym53c8xx driver in both i/o and memory
mapped modes.

Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
CC: Russell King <linux@arm.linux.org.uk>
CC: Peter Maydell <peter.maydell@linaro.org>
diff --git a/MAINTAINERS b/MAINTAINERS
index ddb9ac8..1d38850 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -7210,6 +7210,14 @@
 F:	arch/x86/pci/
 F:	arch/x86/kernel/quirks.c
 
+PCI DRIVER FOR ARM VERSATILE PLATFORM
+M:	Rob Herring <robh@kernel.org>
+L:	linux-pci@vger.kernel.org
+L:	linux-arm-kernel@lists.infradead.org
+S:	Maintained
+F:	Documentation/devicetree/bindings/pci/versatile.txt
+F:	drivers/pci/host/pci-versatile.c
+
 PCI DRIVER FOR APPLIEDMICRO XGENE
 M:	Tanmay Inamdar <tinamdar@apm.com>
 L:	linux-pci@vger.kernel.org