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>