dt-bindings: soc: qcom,rpmh-rsc: simplify qcom,tcs-config

dt-bindings: soc: qcom,rpmh-rsc: simplify qcom,tcs-config

The schema for "qcom,tcs-config" property can be a little bit simpler,
without the need of defining each item.  Also move the description of
each part of "qcom,tcs-config" tupple to the tupple items description.

Suggested-by: Rob Herring <robh@kernel.org>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220426110757.80603-1-krzysztof.kozlowski@linaro.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>