ARM: dts: Configure power domain for omap5 dss

This allows shutting down dss domain when the screen blanks.
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/omap5.dtsi

@@ -410,6 +410,7 @@ target-module@58000000 {
 			      <0x58000014 4>;
 			reg-names = "rev", "syss";
 			ti,syss-mask = <1>;
+			power-domains = <&prm_dss>;
 			clocks = <&dss_clkctrl OMAP5_DSS_CORE_CLKCTRL 0>,
 				 <&dss_clkctrl OMAP5_DSS_CORE_CLKCTRL 9>,
 				 <&dss_clkctrl OMAP5_DSS_CORE_CLKCTRL 10>,