dsp: afe: update wakeup APIs

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: I2415fac50d6370f205450d001e45696916f3c78c
Signed-off-by: Meng Wang <mengw@codeaurora.org>