ARM: dts: dra7: Add properties to enable PCIe x2 lane mode

ti,syscon-lane-sel and ti,syscon-lane-conf properties specific to enable
PCIe x2 lane mode are added here.

Signed-off-by: Kishon Vijay Abraham I <[e-mail]>
Signed-off-by: Sekhar Nori <[e-mail]>
Signed-off-by: Tony Lindgren <[e-mail]>

arch/arm/boot/dts/dra7.dtsi

···
 				ti,hwmods = "pcie1";
 				phys = <&pcie1_phy>;
 				phy-names = "pcie-phy0";
+				ti,syscon-lane-sel = <&scm_conf_pcie 0x18>;
 				interrupt-map-mask = <0 0 0 7>;
 				interrupt-map = <0 0 0 1 &pcie1_intc 1>,
 						<0 0 0 2 &pcie1_intc 2>,
···
 				phys = <&pcie1_phy>;
 				phy-names = "pcie-phy0";
 				ti,syscon-unaligned-access = <&scm_conf1 0x14 1>;
+				ti,syscon-lane-sel = <&scm_conf_pcie 0x18>;
 				status = "disabled";
 			};
 		};