dm: tegra: dts: Add aliases for spi on tegra30 boards

All boards with a SPI interface have a suitable spi alias except the tegra30
boards. Add these missing aliases.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>
diff --git a/arch/arm/dts/tegra30-cardhu.dts b/arch/arm/dts/tegra30-cardhu.dts
index b4fbe71..1b8ed73 100644
--- a/arch/arm/dts/tegra30-cardhu.dts
+++ b/arch/arm/dts/tegra30-cardhu.dts
@@ -18,6 +18,7 @@
 		i2c4 = "/i2c@7000c700";
 		sdhci0 = "/sdhci@78000600";
 		sdhci1 = "/sdhci@78000000";
+		spi0 = "/spi@7000da00";
 		usb0 = "/usb@7d008000";
 	};