ARM: dts: dra7: Add dt node for the sycon pcie

Add new device tree node for the control module register space where
PCIe registers are present.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/dra7.dtsi

@@ -156,6 +156,11 @@ scm_conf1: scm_conf@1c04 {
 					compatible = "syscon";
 					reg = <0x1c04 0x0020>;
 				};
+
+				scm_conf_pcie: scm_conf@1c24 {
+					compatible = "syscon";
+					reg = <0x1c24 0x0024>;
+				};
 			};
 
 			cm_core_aon: cm_core_aon@5000 {