dt-bindings: spmi: Deprecate qcom,bus-id

As it is optional and no platform is actually using the secondary bus,
deprecate the qcom,bus-id property. For newer platforms that implement
SPMI PMIC ARB v7 in HW, the X1E80100 approach should be used.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
Link: https://lore.kernel.org/r/20240417-spmi-multi-master-support-v10-2-5bc6d322e266@linaro.org
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Link: https://lore.kernel.org/r/20240507210809.3479953-8-sboyd@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: abelvesa

Documentation/devicetree/bindings/spmi/qcom,spmi-pmic-arb.yaml

@@ -92,6 +92,7 @@ properties:
     description: >
       SPMI bus instance. only applicable to PMIC arbiter version 7 and beyond.
       Supported values, 0 = primary bus, 1 = secondary bus
+    deprecated: true
 
 required:
   - compatible