arm64: dts: ti: k3-am65*: Use generic gpio for node names

Use gpio@ naming for nodes following standard conventions of device
tree (section 2.2.2 Generic Names recommendation in [1]).

[1] https://github.com/devicetree-org/devicetree-specification/tree/v0.3Suggested-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Lokesh Vutla <lokeshvutla@ti.com>
Acked-by: Suman Anna <s-anna@ti.com>
Link: https://lore.kernel.org/r/20200903130015.21361-4-nm@ti.com

arch/arm64/boot/dts/ti/k3-am65-main.dtsi

@@ -661,7 +661,7 @@ main_cpts_mux: refclk-mux {
 		};
 	};
 
-	main_gpio0:  main_gpio0@600000 {
+	main_gpio0: gpio@600000 {
 		compatible = "ti,am654-gpio", "ti,keystone-gpio";
 		reg = <0x0 0x600000 0x0 0x100>;
 		gpio-controller;
@@ -676,7 +676,7 @@ main_gpio0:  main_gpio0@600000 {
 		clock-names = "gpio";
 	};
 
-	main_gpio1:  main_gpio1@601000 {
+	main_gpio1: gpio@601000 {
 		compatible = "ti,am654-gpio", "ti,keystone-gpio";
 		reg = <0x0 0x601000 0x0 0x100>;
 		gpio-controller;

arch/arm64/boot/dts/ti/k3-am65-wakeup.dtsi

@@ -80,7 +80,7 @@ intr_wkup_gpio: interrupt-controller2 {
 		ti,interrupt-ranges = <0 712 16>;
 	};
 
-	wkup_gpio0: wkup_gpio0@42110000 {
+	wkup_gpio0: gpio@42110000 {
 		compatible = "ti,am654-gpio", "ti,keystone-gpio";
 		reg = <0x42110000 0x100>;
 		gpio-controller;