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>

arch/arc/dts/Makefile

@@ -1,4 +1,5 @@
 dtb-$(CONFIG_TARGET_ARCANGEL4) +=  arcangel4.dtb
+dtb-$(CONFIG_TARGET_TB100) +=  abilis_tb100.dtb
 
 targets += $(dtb-y)
 

arch/arc/dts/abilis_tb100.dts

@@ -0,0 +1,24 @@
+/*
+ * Copyright (C) 2015 Synopsys, Inc. (www.synopsys.com)
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+/dts-v1/;
+
+#include "skeleton.dtsi"
+
+/ {
+	#address-cells = <1>;
+	#size-cells = <1>;
+
+	aliases {
+		console = &uart0;
+	};
+
+	uart0: serial@ff100000 {
+			compatible = "snps,dw-apb-uart";
+			reg = <0xff100000 0x1000>;
+			reg-shift = <2>;
+			reg-io-width = <4>;
+	};
+};