msm: Replace idle wakelocks with pm_qos

Idle wakelocks are being removed so replace them with pm_qos.
Since we don't know every driver's latency requirements we
maintain one-to-one compatabilty with the idle wakelock API by
replacing the wakelock with a pm_qos request of the correct
latency.

Once we determine the actual latency requirements of each driver
we can replace the latency used with the correct latency for the
device.

Change-Id: Icc40f1642218e0de8fc2f56eaf9e8f92914d142f
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>