msm: kgsl: Execute user profiling commands in an IB

Execute user profiling in an indirect buffer. This ensures that addresses
and values specified directly from the user don't end up in the
ringbuffer.

Change-Id: Ic0dedbadedcaab29ce5738a39c1ff6269261bae4
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>