ARM: bcm2835: follow dt uart node-naming convention

This patch fixes the naming of the device tree node: uart@7e201000
to conform to the standard of: serial@7e201000
Signed-off-by: Martin Sperl <kernel@martin.sperl.org>
[anholt: Rebased on 2835.dtsi -> 283x.dtsi change]
Signed-off-by: Eric Anholt <eric@anholt.net>

arch/arm/boot/dts/bcm283x.dtsi

@@ -112,7 +112,7 @@ gpio: gpio@7e200000 {
 			#interrupt-cells = <2>;
 		};
 
-		uart0: uart@7e201000 {
+		uart0: serial@7e201000 {
 			compatible = "brcm,bcm2835-pl011", "arm,pl011", "arm,primecell";
 			reg = <0x7e201000 0x1000>;
 			interrupts = <2 25>;