SoC: soundwire: Add support for device wakeup

Add soundwire API to wakeup soundwire master and slave devices.
These APIs will be used by slave driver to vote and unvote for
master wakeup, when it requires master for register access
operations. Master will be aware of the slave usage with the
vote for device wakeup.

Change-Id: Ifa93f35ab2cffba778cd2fd9a2461e5a58445b75
Signed-off-by: Sudheer Papothi <spapothi@codeaurora.org>
Signed-off-by: Ramprasad Katkam <katkam@codeaurora.org>