dt-bindings: power: reset: qcom-pon: Only allow reboot-mode pre-pmk8350

As pointed out by Shazad [1], PMICs using a separate HLOS+PBS scheme
(so PMK8350 and newer) are expected to pass reboot mode data through SDAM,
as the reboot mode registers are absent in the HLOS reg space.

Limit the reboot-mode.yaml inclusion to PMICs without a separate PBS
region.

[1] https://lore.kernel.org/linux-arm-msm/[e-mail]/

Fixes: 03fccdc76dce ("dt-bindings: power: reset: qcom-pon: Add new compatible "qcom,pmk8350-pon"")
Signed-off-by: Konrad Dybcio <[e-mail]>
Acked-by: Rob Herring <[e-mail]>
Signed-off-by: Sebastian Reichel <[e-mail]>

Documentation/devicetree/bindings/power/reset/qcom,pon.yaml

···
 unevaluatedProperties: false
 
 allOf:
-  - $ref: reboot-mode.yaml#
   - if:
       properties:
         compatible:
···
               - qcom,pms405-pon
               - qcom,pm8998-pon
     then:
+      allOf:
+        - $ref: reboot-mode.yaml#
+
       properties:
         reg:
           maxItems: 1