msm: camera: sync: Increase V4l2 queue size to 250

For MFHDR plus EIS case, both long and short exposure
input ports will be connected. Thus overall connected
ports for EIS will be 8, resulting in V4L2 queue
depth to 240.

CRs-Fixed: 2794286
Change-Id: I12a1ae4129ccb7e3b7211a22891016ecd769b949
Signed-off-by: Shravya Samala <shravyas@codeaurora.org>