msm: camera: sensor: Enable csiphy version 3.4.2.1 on 8940

Enabled csiphy version 3.4.2.1 and added corresponding changes
to enable camera on 8940.

Change-Id: Ib0b0a51761b0e64ccb84fbf750faaa494deea1b7
Signed-off-by: Santhosh Kumar Thimmanna Bhattar <sthim@codeaurora.org>
Signed-off-by: Abhishek Jain <abhij@codeaurora.org>
Signed-off-by: Ebrahim Shaik <eshaik@codeaurora.org>