ARM: dts: Build dtb for Mediatek board

This allows the "make dtbs" to build the aquaris5 dtb for the Mediatek
SoC.

Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
index dd0ebd2..7ad40de 100644
--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile
@@ -499,6 +499,7 @@
 	dove-d2plug.dtb \
 	dove-d3plug.dtb \
 	dove-dove-db.dtb
+dtb-$(CONFIG_ARCH_MEDIATEK) += mt6589-aquaris5.dtb
 
 targets += dtbs dtbs_install
 targets += $(dtb-y)