cnss2: Add force wake support for time sync

Before accessing time sync related PCIe registers, it needs make
sure the registers are in awake state. Add the support to force wake
up before time sync updating and unvote when updating is done.

Change-Id: I8af53d3b88e40e56f39bf4a014d81eaaa2f8ead9
Signed-off-by: Yue Ma <yuem@codeaurora.org>