msm: ais: cpp fix to check zero length ioctl
Port of ioctl validation for zero length ioctl
from camera_v2.
Change-Id: I635522f331d1e18641196ee3101c64ccc285636a
CRs-fixed: 2025367
Signed-off-by:
Terence Ho <terenceh@codeaurora.org>
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