zynq: add UART nodes to device tree to initialize UART with OF

Commit c9416b92 added OF UART initialization support
but aliases nodes are missing in device tree.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Michal Simek <michal.simek@xilinx.com>
Tested-by: Masahiro Yamada <yamada.m@jp.panasonic.com> [on ZC706 board]
Tested-by: Michal Simek <michal.simek@xilinx.com> [on ZC702 board]
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/arch/arm/dts/zynq-zc770-xm010.dts b/arch/arm/dts/zynq-zc770-xm010.dts
index 8d68208..5e661749 100644
--- a/arch/arm/dts/zynq-zc770-xm010.dts
+++ b/arch/arm/dts/zynq-zc770-xm010.dts
@@ -12,6 +12,10 @@
 	model = "Zynq ZC770 XM010 Board";
 	compatible = "xlnx,zynq-zc770-xm010", "xlnx,zynq-7000";
 
+	aliases {
+		serial0 = &uart1;
+	};
+
 	memory {
 		device_type = "memory";
 		reg = <0 0x40000000>;