dt-bindings: soc: qcom: apr: add missing properties

The APR bindings were not describing all properties already used in DTS:
1. Add qcom,glink-channels, qcom,smd-channels and qcom,intents (widely
   used).
2. Add power-domains for MSM8996.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220910091428.50418-16-krzysztof.kozlowski@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>