msm: camera: reqmgr: Add provision in UAPI for INIT exp timeout

Add provision in CRM link control to accept any long exposure
timeout value so that CRM can modify it's internal WD timer
during link activate.

CRs-Fixed: 2679913
Change-Id: Icedeeef32dcc5c881277f28dc2c0fbb40fa1e7f1
Signed-off-by: Karthik Anantha Ram <kartanan@codeaurora.org>