ARM: omap4.dtsi: Add audio related parametes to hdmi node

Adds HDMI audio sDMA properties.
Signed-off-by: NJyri Sarha <jsarha@ti.com>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>
Acked-by: NTony Lindgren <tony@atomide.com>

arch/arm/boot/dts/omap4.dtsi

@@ -922,6 +922,8 @@
 				ti,hwmods = "dss_hdmi";
 				clocks = <&dss_48mhz_clk>, <&dss_sys_clk>;
 				clock-names = "fck", "sys_clk";
+				dmas = <&sdma 76>;
+				dma-names = "audio_tx";
 			};
 		};
 	};