soc: swr-mstr: Vote for core vote before clock request

For soundwire devices, if core vote function is available,
do a core vote before doing a clock request. This way
we retain any hardware votes needed before doing a read
or write.

Change-Id: If29b5f102be4f2d60e6d71cae70ac43e3fdaa00c
Signed-off-by: Karthikeyan Mani <kmani@codeaurora.org>