msm: camera: common: Fix possible OOB reads and writes operations

We need to check if the packet is valid before using it.

CRs-Fixed: 3605421
Change-Id: Ide4e005ba46690c1cac02cb77a2d9aaa497b15df
Signed-off-by: Yash Upadhyay <quic_yupadhya@quicinc.com>