powerpc: ppc4xx: dts: Bring in canyonlands device tree files

The canyonlands.h config file works with canyonlands, glacier and arches
boards. Bring in the device tree files for these from Linux 3.17.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/powerpc/dts/Makefile b/arch/powerpc/dts/Makefile
new file mode 100644
index 0000000..ad104b9
--- /dev/null
+++ b/arch/powerpc/dts/Makefile
@@ -0,0 +1,11 @@
+dtb-$(CONFIG_TARGET_CANYONLANDS) += arches.dtb canyonlands.dtb glacier.dtb
+
+targets += $(dtb-y)
+
+DTC_FLAGS += -R 4 -p 0x1000
+
+PHONY += dtbs
+dtbs: $(addprefix $(obj)/, $(dtb-y))
+	@:
+
+clean-files := *.dtb