ARM: dts: Configure power domain for omap4 dsp

This allows shutting down the dsp domain when not in use.
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/omap4-l4.dtsi

@@ -330,6 +330,7 @@ SYSC_OMAP2_SOFTRESET |
 			/* Domains (V, P, C): iva, tesla_pwrdm, tesla_clkdm */
 			clocks = <&tesla_clkctrl OMAP4_DSP_CLKCTRL 0>;
 			clock-names = "fck";
+			power-domains = <&prm_tesla>;
 			resets = <&prm_tesla 1>;
 			reset-names = "rstctrl";
 			#address-cells = <1>;