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-colibri.dts b/arch/arm/dts/tegra30-colibri.dts
index 43d03ca..df79c26 100644
--- a/arch/arm/dts/tegra30-colibri.dts
+++ b/arch/arm/dts/tegra30-colibri.dts
@@ -12,6 +12,7 @@
 		i2c2 = "/i2c@7000c700";
 		sdhci0 = "/sdhci@78000600";
 		sdhci1 = "/sdhci@78000200";
+		spi0 = "/spi@7000d400";
 		usb0 = "/usb@7d000000";
 		usb1 = "/usb@7d004000"; /* on module only, for ASIX */
 		usb2 = "/usb@7d008000";