dt-bindings: clock: Convert qcom,mmcc to DT schema

dt-bindings: clock: Convert qcom,mmcc to DT schema

Convert the qcom,mmcc-X clock controller binding to DT schema.  Add the
protected-clocks property to the schema to show that is it explicitly
allowed, instead of relying on the generic, pre-schema binding.

Signed-off-by: Jeffrey Hugo <jhugo@codeaurora.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lkml.kernel.org/r/1576596003-10093-1-git-send-email-jhugo@codeaurora.org
Signed-off-by: Stephen Boyd <sboyd@kernel.org>