msm: camera: Return -NOTTY on invalid ioctl command.

Check validity of command before processing.

Bug: 67713103

CRs-Fixed: 2083314

Change-Id: Icc5c57eac999b7c40fbb9505b2b88745167adc66
Signed-off-by: Trishansh Bhardwaj <tbhardwa@codeaurora.org>
Signed-off-by: Satyanarayana Dash <sadash@codeaurora.org>