ARM: dts: qcom: rename kpss-acc-v2 nodes to power-manager nodes

Change kpss-acc-v2 nodes naming to power-manager to reflect Documentation
schema.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230116204751.23045-8-ansuelsmth@gmail.com