dts: vt8500: Update serial nodes and disable by default in SoC files

Missing aliases for uarts on vt8500, wm8505, wm8650 added.
Nodes incorrectly labelled uart@.., changed to serial@... on all SoCs.
Set each uarts default status = "disabled" as they generally don't exist.

For each board file, we only need to enable uart0 as no other uarts are
physically present on any of these boards.

Signed-off-by: Tony Prisk <linux@prisktech.co.nz>
diff --git a/arch/arm/boot/dts/wm8750.dtsi b/arch/arm/boot/dts/wm8750.dtsi
index 462de58..e4a1e85 100644
--- a/arch/arm/boot/dts/wm8750.dtsi
+++ b/arch/arm/boot/dts/wm8750.dtsi
@@ -258,46 +258,52 @@
 			interrupts = <26>;
 		};
 
-		uart0: uart@d8200000 {
+		uart0: serial@d8200000 {
 			compatible = "via,vt8500-uart";
 			reg = <0xd8200000 0x1040>;
 			interrupts = <32>;
 			clocks = <&clkuart0>;
+			status = "disabled";
 		};
 
-		uart1: uart@d82b0000 {
+		uart1: serial@d82b0000 {
 			compatible = "via,vt8500-uart";
 			reg = <0xd82b0000 0x1040>;
 			interrupts = <33>;
 			clocks = <&clkuart1>;
+			status = "disabled";
 		};
 
-                uart2: uart@d8210000 {
+                uart2: serial@d8210000 {
                         compatible = "via,vt8500-uart";
                         reg = <0xd8210000 0x1040>;
                         interrupts = <47>;
                         clocks = <&clkuart2>;
+			status = "disabled";
                 };
 
-                uart3: uart@d82c0000 {
+                uart3: serial@d82c0000 {
                         compatible = "via,vt8500-uart";
                         reg = <0xd82c0000 0x1040>;
                         interrupts = <50>;
                         clocks = <&clkuart3>;
+			status = "disabled";
                 };
 
-                uart4: uart@d8370000 {
+                uart4: serial@d8370000 {
                         compatible = "via,vt8500-uart";
                         reg = <0xd8370000 0x1040>;
                         interrupts = <30>;
                         clocks = <&clkuart4>;
+			status = "disabled";
                 };
 
-                uart5: uart@d8380000 {
+                uart5: serial@d8380000 {
                         compatible = "via,vt8500-uart";
                         reg = <0xd8380000 0x1040>;
                         interrupts = <43>;
                         clocks = <&clkuart5>;
+			status = "disabled";
                 };
 
 		rtc@d8100000 {