soc: qcom: qcom_stats: Fix client votes offset

Client votes starts at 0x20 offset. Correct the offset.

Reported-and-suggested-by: Shawn Guo <shawn.guo@linaro.org>
Fixes: 1d772469 ("soc: qcom: Add Sleep stats driver")
Signed-off-by: Maulik Shah <mkshah@codeaurora.org>
Reviewed-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/1634719753-26064-1-git-send-email-mkshah@codeaurora.org