ARM: tegra: rename colibri_t20 board/configuration/device-tree

In accordance with our other modules supported by U-Boot and as agreed
upon for Apalis/Colibri T30 get rid of the carrier board in the board/
configuration/device-tree naming.

While at it also bring the prompt more in line with our other products.

Signed-off-by: Marcel Ziswiler <marcel@ziswiler.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index cbe5b86..f897e6d 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -24,7 +24,7 @@
 	tegra20-trimslice.dtb \
 	tegra20-ventana.dtb \
 	tegra20-whistler.dtb \
-	tegra20-colibri_t20_iris.dtb \
+	tegra20-colibri.dtb \
 	tegra30-apalis.dtb \
 	tegra30-beaver.dtb \
 	tegra30-cardhu.dtb \