ARM: sunxi: Restructure sunxi dts/dtsi files

For the new sun4i/Cubieboard (A10) support, lets re-strucure the
sun5i dts files to make it more generic. Those are the new
dts/dtsi files:

sunxi.dtsi - Devices common to all Allwinner sunXi SoC's
sun4i.dtsi - sun4i Devices, will include sunxi.dtsi
sun5i.dtsi - sun5i Devices, will include sunxi.dtsi
board.dts - will include either sun4i.dtsi or sun5i.dtsi

Additionally the "duart" label in the olinuxino.dts is changed to
"uart1".

Signed-off-by: Stefan Roese <sr@denx.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
diff --git a/arch/arm/boot/dts/sun5i-olinuxino.dts b/arch/arm/boot/dts/sun5i-olinuxino.dts
index 3b1cce3..d6ff889 100644
--- a/arch/arm/boot/dts/sun5i-olinuxino.dts
+++ b/arch/arm/boot/dts/sun5i-olinuxino.dts
@@ -18,8 +18,12 @@
 	model = "Olimex A13-Olinuxino";
 	compatible = "olimex,a13-olinuxino", "allwinner,sun5i";
 
+	chosen {
+		bootargs = "earlyprintk console=ttyS0,115200";
+	};
+
 	soc {
-		duart: uart@01c28400 {
+		uart1: uart@01c28400 {
 			status = "okay";
 		};
 	};