copper: load device tree blob

Update LK to find the device tree from the device tree
table present in the boot.img.

Change-Id: I097908c20a6db954e92965df748b1061ccba17dd
diff --git a/project/copper.mk b/project/copper.mk
index f3af929..e6e7b40 100644
--- a/project/copper.mk
+++ b/project/copper.mk
@@ -11,4 +11,4 @@
 #DEFINES += WITH_DEBUG_DCC=1
 DEFINES += WITH_DEBUG_UART=1
 #DEFINES += WITH_DEBUG_FBCON=1
-#DEFINES += DEVICE_TREE=1
+DEFINES += DEVICE_TREE=1