dt-bindings: clock: Add RPMHCC bindings for SC7280

Add bindings and update documentation for clock rpmh driver on SC7280.
Signed-off-by: Taniya Das <tdas@codeaurora.org>
Link: https://lore.kernel.org/r/1612977230-11566-2-git-send-email-tdas@codeaurora.orgSigned-off-by: Stephen Boyd <sboyd@kernel.org>

Documentation/devicetree/bindings/clock/qcom,rpmhcc.yaml

@@ -18,6 +18,7 @@ properties:
   compatible:
     enum:
       - qcom,sc7180-rpmh-clk
+      - qcom,sc7280-rpmh-clk
       - qcom,sc8180x-rpmh-clk
       - qcom,sdm845-rpmh-clk
       - qcom,sdx55-rpmh-clk