ARM: omap2.dtsi: add omapdss information

Add DT data for OMAP2 display subsystem, which contains the following
blocks:

dss - the wrapper/glue for the display modules
dispc - display controller
rfbi - MIPI DBI encoder
venc - analog TV encoder
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>
Acked-by: NTony Lindgren <tony@atomide.com>

arch/arm/boot/dts/omap2.dtsi

@@ -271,5 +271,36 @@
 			ti,hwmods = "timer12";
 			ti,timer-pwm;
 		};
+
+		dss: dss@48050000 {
+			compatible = "ti,omap2-dss";
+			reg = <0x48050000 0x400>;
+			status = "disabled";
+			ti,hwmods = "dss_core";
+			#address-cells = <1>;
+			#size-cells = <1>;
+			ranges;
+
+			dispc@48050400 {
+				compatible = "ti,omap2-dispc";
+				reg = <0x48050400 0x400>;
+				interrupts = <25>;
+				ti,hwmods = "dss_dispc";
+			};
+
+			rfbi: encoder@48050800 {
+				compatible = "ti,omap2-rfbi";
+				reg = <0x48050800 0x400>;
+				status = "disabled";
+				ti,hwmods = "dss_rfbi";
+			};
+
+			venc: encoder@48050c00 {
+				compatible = "ti,omap2-venc";
+				reg = <0x48050c00 0x400>;
+				status = "disabled";
+				ti,hwmods = "dss_venc";
+			};
+		};
 	};
 };