msm: camera: Enable AVTimer related APIs

Uncomment the code related to using AVTimer APIs to retrieve
TimeStamp information from QDSP.

CRs-fixed: 498762
Change-Id: I727f0d4219da2e9ccd5e88d18d1041a82abbb4cc
Signed-off-by: Alok Kediya <kediya@codeaurora.org>