ARM: dts: rockchip: rename thermal subnodes for rk3288

A test with the command below gives for example this error:
/arch/arm/boot/dts/rk3288-tinker.dt.yaml:
thermal-zones: 'cpu_thermal', 'gpu_thermal', 'reserve_thermal'
do not match any of the regexes:
'^[a-zA-Z][a-zA-Z0-9\\-]{1,12}-thermal$', 'pinctrl-[0-9]+'

Rename Rockchip rk3288 thermal subnodes
so that it ends with "-thermal"

make ARCH=arm dtbs_check
DT_SCHEMA_FILES=Documentation/devicetree/bindings/
thermal/thermal-zones.yaml

Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Link: https://lore.kernel.org/r/20210117150953.16475-1-jbx6244@gmail.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm/boot/dts/rk3288.dtsi

@@ -488,14 +488,14 @@
 	};
 
 	thermal-zones {
-		reserve_thermal: reserve_thermal {
+		reserve_thermal: reserve-thermal {
 			polling-delay-passive = <1000>; /* milliseconds */
 			polling-delay = <5000>; /* milliseconds */
 
 			thermal-sensors = <&tsadc 0>;
 		};
 
-		cpu_thermal: cpu_thermal {
+		cpu_thermal: cpu-thermal {
 			polling-delay-passive = <100>; /* milliseconds */
 			polling-delay = <5000>; /* milliseconds */
 
@@ -539,7 +539,7 @@
 			};
 		};
 
-		gpu_thermal: gpu_thermal {
+		gpu_thermal: gpu-thermal {
 			polling-delay-passive = <100>; /* milliseconds */
 			polling-delay = <5000>; /* milliseconds */