soc: qcom: rpmpd: Remove useless comments

It goes without saying that socname_rpmpds[] is the array of the RPM
power domains associated with socname. Remove these comments.

Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230313-topic-rpmpd-v3-10-06a4f448ff90@linaro.org