board: mediatek: Add support for UniElec U7623 board

This is an MT7623A-based board, very similar to the Banana Pi R2.

http://www.unielecinc.com/q/news/cn/p/product/detail.html?qd_guid=OjXwKCaRlN

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index a3a1e3f..caa7756 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -949,6 +949,7 @@
 
 dtb-$(CONFIG_ARCH_MEDIATEK) += \
 	mt7622-rfb.dtb \
+	mt7623a-unielec-u7623-02-emmc.dtb \
 	mt7623n-bananapi-bpi-r2.dtb \
 	mt7629-rfb.dtb \
 	mt8512-bm1-emmc.dtb \