msm: dcvs: use wait_q

It is cleaner to use wait_q mechanism instead of waking up the thread
and managing the scheduling flag ourselves.

Change-Id: Ie0d7ec8e74400fb31c7d0a33c0d4520fca658c29
Signed-off-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org>
1 file changed