dt-binding: watchdog: add Rockchip compatibles to snps,dw-wdt.yaml

The Rockchip watchdog compatibles below are already in use,
but somehow never added to a document,
so add them to the snps,dw-wdt.yaml file.

"rockchip,rk3066-wdt", "snps,dw-wdt"
"rockchip,rk3188-wdt", "snps,dw-wdt"
"rockchip,rk3288-wdt", "snps,dw-wdt"
"rockchip,rk3368-wdt", "snps,dw-wdt"

make ARCH=arm dtbs_check
DT_SCHEMA_FILES=Documentation/devicetree/bindings/watchdog/snps,dw-wdt.yaml

make ARCH=arm64 dtbs_check
DT_SCHEMA_FILES=Documentation/devicetree/bindings/watchdog/snps,dw-wdt.yaml

Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20201116142539.12377-1-jbx6244@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>

Documentation/devicetree/bindings/watchdog/snps,dw-wdt.yaml

@@ -14,7 +14,15 @@ maintainers:
 
 properties:
   compatible:
-    const: snps,dw-wdt
+    oneOf:
+      - const: snps,dw-wdt
+      - items:
+          - enum:
+              - rockchip,rk3066-wdt
+              - rockchip,rk3188-wdt
+              - rockchip,rk3288-wdt
+              - rockchip,rk3368-wdt
+          - const: snps,dw-wdt
 
   reg:
     maxItems: 1