drm/msm: Move QTI specific ioctls to avoid conflict

To avoid conflicting with upstream changes when upgrading the kernel
version, move QTI specific ioctls to start at command number 0x40.
This provides plenty of space for the upstream ioctl list to grown
before there are conflicts.

Change-Id: Ic0dedbadad9d3a24467f3d5992104754e31cd769
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>