asoc: update wakeup_source API

wakeup_source_init and wakeup_source_trash are removed
in new kernel. Update these two APIs to wakeup_source_register
and wakeup_source_unregister.

Change-Id: If628aac4f5391b483bb20e66b49cdf47618462c9
Signed-off-by: Meng Wang <mengw@codeaurora.org>