wcnss: Rename clock name and add control interface for vote clock

The clock name has been changed in clock-8226.c,so need update
the name here also.
The control interface is for easy control of this clock dynamicaly.

Change-Id: I9b5a1fbd6237162a92fe83997614f2823c5e68ff
Signed-off-by: Sheng Fang <fsheng@codeaurora.org>
2 files changed