ARM: sunxi: Rename uart nodes to serial

The other architecture use serial@address for their uart nodes, so
rename our uart dt nodes to be consistent

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
diff --git a/arch/arm/boot/dts/sun4i-a10-cubieboard.dts b/arch/arm/boot/dts/sun4i-a10-cubieboard.dts
index 88e2dc1..cd06a3c 100644
--- a/arch/arm/boot/dts/sun4i-a10-cubieboard.dts
+++ b/arch/arm/boot/dts/sun4i-a10-cubieboard.dts
@@ -36,11 +36,11 @@
 			};
 		};
 
-		uart0: uart@01c28000 {
+		uart0: serial@01c28000 {
 			status = "okay";
 		};
 
-		uart1: uart@01c28400 {
+		uart1: serial@01c28400 {
 			status = "okay";
 		};
 	};