dt-bindings: watchdog: dlg,da9062-watchdog: Add fallback for DA9061 watchdog

The DA9061 watchdog is identical to DA9062 watchdog, so no driver changes
are required. The fallback compatible string "dlg,da9062-watchdog" will be
used on DA9061 watchdog.
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20231210134717.94020-3-biju.das.jz@bp.renesas.comSigned-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>

Documentation/devicetree/bindings/watchdog/dlg,da9062-watchdog.yaml

@@ -14,9 +14,12 @@ allOf:
 
 properties:
   compatible:
-    enum: 
-      - dlg,da9061-watchdog
-      - dlg,da9062-watchdog
+    oneOf:
+      - enum:
+          - dlg,da9062-watchdog
+      - items:
+          - const: dlg,da9061-watchdog
+          - const: dlg,da9062-watchdog
 
   dlg,use-sw-pm:
     type: boolean