TI PCI Controllers

PCIe Designware Controller
 - compatible: Should be "ti,dra7-pcie""
 - reg : Two register ranges as listed in the reg-names property
 - reg-names : The first entry must be "ti-conf" for the TI specific registers
	       The second entry must be "rc-dbics" for the designware pcie
	       registers
	       The third entry must be "config" for the PCIe configuration space
 - phys : list of PHY specifiers (used by generic PHY framework)
 - phy-names : must be "pcie-phy0", "pcie-phy1", "pcie-phyN".. based on the
	       number of PHYs as specified in *phys* property.
 - ti,hwmods : Name of the hwmod associated to the pcie, "pcie<X>",
	       where <X> is the instance number of the pcie from the HW spec.
 - interrupts : Two interrupt entries must be specified. The first one is for
		main interrupt line and the second for MSI interrupt line.
 - #address-cells,
   #size-cells,
   #interrupt-cells,
   device_type,
   ranges,
   num-lanes,
   interrupt-map-mask,
   interrupt-map : as specified in ../designware-pcie.txt

Optional Property:
 - gpios : Should be added if a gpio line is required to drive PERST# line

Example:
axi {
	compatible = "simple-bus";
	#size-cells = <1>;
	#address-cells = <1>;
	ranges = <0x51000000 0x51000000 0x3000
		  0x0	     0x20000000 0x10000000>;
	pcie@51000000 {
		compatible = "ti,dra7-pcie";
		reg = <0x51000000 0x2000>, <0x51002000 0x14c>, <0x1000 0x2000>;
		reg-names = "rc_dbics", "ti_conf", "config";
		interrupts = <0 232 0x4>, <0 233 0x4>;
		#address-cells = <3>;
		#size-cells = <2>;
		device_type = "pci";
		ranges = <0x81000000 0 0          0x03000 0 0x00010000
			  0x82000000 0 0x20013000 0x13000 0 0xffed000>;
		#interrupt-cells = <1>;
		num-lanes = <1>;
		ti,hwmods = "pcie1";
		phys = <&pcie1_phy>;
		phy-names = "pcie-phy0";
		interrupt-map-mask = <0 0 0 7>;
		interrupt-map = <0 0 0 1 &pcie_intc 1>,
				<0 0 0 2 &pcie_intc 2>,
				<0 0 0 3 &pcie_intc 3>,
				<0 0 0 4 &pcie_intc 4>;
		pcie_intc: interrupt-controller {
			interrupt-controller;
			#address-cells = <0>;
			#interrupt-cells = <1>;
		};
	};
};
