dt-bindings: watchdog: Add BCM6345 compatible to BCM7038 binding

The BCM7038 watchdog binding is updated to include a "brcm,bcm6345-wdt"
compatible string which is the first instance of a DSL (BCM63xx) SoC
seeing the integration of such a watchdog timer block.

Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20211112224636.395101-3-f.fainelli@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/brcm,bcm7038-wdt.yaml

@@ -4,7 +4,7 @@
 $id: http://devicetree.org/schemas/watchdog/brcm,bcm7038-wdt.yaml#
 $schema: http://devicetree.org/meta-schemas/core.yaml#
 
-title: BCM7038 watchdog timer
+title: BCM63xx and BCM7038 watchdog timer
 
 allOf:
   - $ref: "watchdog.yaml#"
@@ -16,7 +16,9 @@ maintainers:
 
 properties:
   compatible:
-    const: brcm,bcm7038-wdt
+    enum:
+      - brcm,bcm6345-wdt
+      - brcm,bcm7038-wdt
 
   reg:
     maxItems: 1