ARM: dts: dra7: Add dt node for the syscon control module wkup

Create a system control module node for the control module portion that
resides under l4_wkup.

Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/dra7.dtsi

@@ -233,6 +233,11 @@
 				prm_clockdomains: clockdomains {
 				};
 			};
+
+			scm_wkup: scm_conf@c000 {
+				compatible = "syscon";
+				reg = <0xc000 0x1000>;
+			};
 		};
 
 		axi@0 {