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-hackberry.dts b/arch/arm/boot/dts/sun4i-a10-hackberry.dts
index f84549a..9ab6875 100644
--- a/arch/arm/boot/dts/sun4i-a10-hackberry.dts
+++ b/arch/arm/boot/dts/sun4i-a10-hackberry.dts
@@ -23,7 +23,7 @@
 	};
 
 	soc {
-		uart0: uart@01c28000 {
+		uart0: serial@01c28000 {
 			status = "okay";
 		};
 	};