board: Switch Abilis TB-100 board to Driver Model for serial port

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Simon Glass <sjg@chromium.org>
diff --git a/arch/arc/dts/Makefile b/arch/arc/dts/Makefile
index a155311..5bc6f44 100644
--- a/arch/arc/dts/Makefile
+++ b/arch/arc/dts/Makefile
@@ -1,4 +1,5 @@
 dtb-$(CONFIG_TARGET_ARCANGEL4) +=  arcangel4.dtb
+dtb-$(CONFIG_TARGET_TB100) +=  abilis_tb100.dtb
 
 targets += $(dtb-y)