ARM: tegra30: convert device tree files to use CLK defines

Use the Tegra30 CAR binding header (tegra30-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 tegra30-car.h moved for consistency]
Signed-off-by: Stephen Warren <swarren@nvidia.com>

arch/arm/boot/dts/tegra30-cardhu.dtsi

@@ -519,7 +519,9 @@ sound {
 		nvidia,hp-det-gpios = <&gpio TEGRA_GPIO(W, 2)
 			GPIO_ACTIVE_HIGH>;
 
-		clocks = <&tegra_car 184>, <&tegra_car 185>, <&tegra_car 120>;
+		clocks = <&tegra_car TEGRA30_CLK_PLL_A>,
+			 <&tegra_car TEGRA30_CLK_PLL_A_OUT0>,
+			 <&tegra_car TEGRA30_CLK_EXTERN1>;
 		clock-names = "pll_a", "pll_a_out0", "mclk";
 	};
 };