msm:camera: Fix overflow issue in ioctl_hw_cmds function

    'len' is of type signed int 32bit,but the assigned value
    may exceed maximum unsigned int32 range.Add overflow check
    and graceful exit if 'm'exceeds UINT32_MAX value.

Change-Id: I38f0d10a0cb44d08d0054f91044fc891c246ebd1
CRs-Fixed: 493314
Signed-off-by: Monika Alekhya <malekh@codeaurora.org>
msm-camera: Removing MSM_GMN_IOCTL_TEST_DUMP_REGION ioctl

Removing the MSM_GMN_IOCTL_TEST_DUMP_REGION call because this
is not used.

CRs-Fixed: 496905
Depends-on: 372524

Change-Id: I91147bbf67055351a115687a18a1172a649d5d6a
Signed-off-by: Katta Santhisindhu <kattas@codeaurora.org>