ARM: tegra20: convert device tree files to use CLK defines

Use the Tegra20 CAR binding header (tegra20-car.h) to replace magic
numbers in the device tree. For example,

-               clocks = <&tegra_car 28>;
+               clocks = <&tegra_car CLK_HOST1X>;

Signed-off-by: Hiroshi Doyu <hdoyu@nvidia.com>
[swarren, updated since tegra20-car.h moved for consistency]
Signed-off-by: Stephen Warren <swarren@nvidia.com>
diff --git a/arch/arm/boot/dts/tegra20-ventana.dts b/arch/arm/boot/dts/tegra20-ventana.dts
index e0c0cc1..7f8c28d 100644
--- a/arch/arm/boot/dts/tegra20-ventana.dts
+++ b/arch/arm/boot/dts/tegra20-ventana.dts
@@ -654,7 +654,9 @@
 		nvidia,ext-mic-en-gpios = <&gpio TEGRA_GPIO(X, 1)
 			GPIO_ACTIVE_HIGH>;
 
-		clocks = <&tegra_car 112>, <&tegra_car 113>, <&tegra_car 94>;
+		clocks = <&tegra_car TEGRA20_CLK_PLL_A>,
+			 <&tegra_car TEGRA20_CLK_PLL_A_OUT0>,
+			 <&tegra_car TEGRA20_CLK_CDEV1>;
 		clock-names = "pll_a", "pll_a_out0", "mclk";
 	};
 };