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

Convert the text bindings for the lcc to yaml format. Doing this showed
that clocks and clock-names were not documented, so fix that now.

Signed-off-by: Luca Weiss <luca@z3ntu.xyz>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221016143514.612851-1-luca@z3ntu.xyz