Add MSM8996 compatible strings to CX and SSC-CX power domains.

This depends on: "dt-bindings: remoteproc: qcom: pas: Convert binding to YAML"
https://lore.kernel.org/linux-arm-msm/20210505082200.32635-1-manivannan.sadhasivam@linaro.org/T/#uAcked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Yassine Oudjana <y.oudjana@protonmail.com>
Link: https://lore.kernel.org/r/lRf8M7F6Qo9s7tlx6vuAWHThg26ls3u6SvQn1PLrAdI@cp4-web-038.plabs.chSigned-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>