arm64: dts: qcom: msm8996: Remove PNoC clock from MSS

The PNoC clock is a clock for the entire PNoC bus, managed from
within the interconnect driver. Attaching it to MSS was a total hack.
Get rid of it and take the liberty to make the clock-names entries
more readable.

Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Link: https://lore.kernel.org/r/20230721-topic-rpm_clk_cleanup-v3-9-a66e698932e3@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>