soc: qcom: pil: Vote for bus during pil shutdown path

In SDM845, there is a requirement to vote for buses before certain
clocks can be enabled. Add the bus votes into the shutdown path as well
in order to enable the dependent clocks.

Change-Id: Iec9ac5dc36a445503e00232b5b3e9d4d199ae4b2
Signed-off-by: Kyle Yan <kyan@codeaurora.org>