dt-bindings: clock: qcom-rpmhcc: Add RPMHCC bindings for X1E80100

Add bindings and update documentation for clock rpmh driver on X1E80100
SoCs.

Signed-off-by: Rajendra Nayak <quic_rjendra@quicinc.com>
Co-developed-by: Sibi Sankar <quic_sibis@quicinc.com>
Signed-off-by: Sibi Sankar <quic_sibis@quicinc.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20231205061002.30759-4-quic_sibis@quicinc.com


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