arm64: dts: qcom: sc7180: Add rpmh-rsc node

Add device bindings for the application processor's rsc. The rsc
contains the TCS that are used for communicating with the hardened
resource accelerators on Qualcomm Technologies, Inc. (QTI) SoCs.

Signed-off-by: Maulik Shah <mkshah@codeaurora.org>
Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Link: https://lore.kernel.org/r/20191108092824.9773-6-rnayak@codeaurora.org


Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>