msm: camera: cci: Fix CCI Timeout during burst_read concurrency

During burst read concurrency, is_burst_read variable not updated
properly leading to missing th_complete signal. is_burst_read variable
updated per master to avoid concurrency issue.

CRs-Fixed: 2962232
Change-Id: Id741d48e0b9a6987b4aa7bc7361daf555d9bc587
Signed-off-by: Anil Kumar Kanakanti <akanakan@codeaurora.org>