dm: sunxi: Add a new config for an FDT-based pcDuino3

For now we won't want to mess with the existing configurations. Create a
new one which will enable device tree and driver model. Note that this
brings the device tree binary into u-boot-sunxi-with-spl.bin.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
diff --git a/Makefile b/Makefile
index 26dacee..9c8a580 100644
--- a/Makefile
+++ b/Makefile
@@ -946,7 +946,8 @@
 ifneq ($(CONFIG_SUNXI),)
 OBJCOPYFLAGS_u-boot-sunxi-with-spl.bin = -I binary -O binary \
 				   --pad-to=$(CONFIG_SPL_PAD_TO) --gap-fill=0xff
-u-boot-sunxi-with-spl.bin: spl/sunxi-spl.bin u-boot.img FORCE
+u-boot-sunxi-with-spl.bin: spl/sunxi-spl.bin \
+			u-boot$(if $(CONFIG_OF_CONTROL),-dtb,).img FORCE
 	$(call if_changed,pad_cat)
 endif