msm: camera: fix bound check of offset to avoid overread overwrite

Fix bound check of hw_cmd_p->offset in msm_jpeg_hw_exec_cmds
to avoid overread overwrite.

CRs-Fixed: 1088824
Change-Id: Ifaa4b5387d4285ddce16d8e745aa0500c64c568b
Signed-off-by: Krishnankutty Kolathappilly <kkolatha@codeaurora.org>
Signed-off-by: VijayaKumar T M <vtmuni@codeaurora.org>