arm64: dts: qcom: sc8280xp: add gpr node

Add GPR node along with APM(Audio Process Manager) and PRM(Proxy
resource Manager) audio services.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221123104342.26140-2-srinivas.kandagatla@linaro.org