ARM: tegra: whistler: enable HDMI port

Enable host1x, and the HDMI output. Whistler also has a DSI-based LCD,
and a VGA output. tegradrm doesn't support either of those output types
yet.

Based on work by Thierry Reding for TrimSlice.
Signed-off-by: Stephen Warren <swarren@nvidia.com>

arch/arm/boot/dts/tegra20-whistler.dts

@@ -10,6 +10,18 @@ memory {
 		reg = <0x00000000 0x20000000>;
 	};
 
+	host1x {
+		hdmi {
+			status = "okay";
+
+			vdd-supply = <&hdmi_vdd_reg>;
+			pll-supply = <&hdmi_pll_reg>;
+
+			nvidia,ddc-i2c-bus = <&hdmi_ddc>;
+			nvidia,hpd-gpio = <&gpio 111 0>; /* PN7 */
+		};
+	};
+
 	pinmux {
 		pinctrl-names = "default";
 		pinctrl-0 = <&state_default>;
@@ -246,6 +258,11 @@ serial@70006000 {
 		clock-frequency = <216000000>;
 	};
 
+	hdmi_ddc: i2c@7000c400 {
+		status = "okay";
+		clock-frequency = <100000>;
+	};
+
 	i2c@7000d000 {
 		status = "okay";
 		clock-frequency = <100000>;
@@ -356,7 +373,7 @@ ldo5 {
 					regulator-always-on;
 				};
 
-				ldo6 {
+				hdmi_pll_reg: ldo6 {
 					regulator-name = "nvvdd_ldo6,avdd_hdmi_pll";
 					regulator-min-microvolt = <1800000>;
 					regulator-max-microvolt = <1800000>;
@@ -388,7 +405,7 @@ ldo10 {
 					regulator-always-on;
 				};
 
-				ldo11 {
+				hdmi_vdd_reg: ldo11 {
 					regulator-name = "nvvdd_ldo11,vddio_pex_clk,vcom_33,avdd_hdmi";
 					regulator-min-microvolt = <3300000>;
 					regulator-max-microvolt = <3300000>;