dt-bindings: watchdog: qcom-wdt: do not allow fallback alone

The compatible "qcom,kpss-wdt" is too generic and should not be used
alone.  Mark it as deprecated when not prepended by specific compatible.

Signed-off-by: Krzysztof Kozlowski <[email protected]>
Acked-by: Rob Herring <[email protected]>
Reviewed-by: Guenter Roeck <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Guenter Roeck <[email protected]>
Signed-off-by: Wim Van Sebroeck <[email protected]>

Author: krzk

Documentation/devicetree/bindings/watchdog/qcom-wdt.yaml

@@ -31,9 +31,10 @@ properties:
               - qcom,apss-wdt-sm8150
               - qcom,apss-wdt-sm8250
           - const: qcom,kpss-wdt
+      - const: qcom,kpss-wdt
+        deprecated: true
       - items:
           - enum:
-              - qcom,kpss-wdt
               - qcom,kpss-timer
               - qcom,kpss-wdt-apq8064
               - qcom,kpss-wdt-ipq8064