msm: sde: enable traffic shaper for inline prefill bw

Inline prefill bw allows inline rotation to control prefill
bandwidth by traffic shaper. It is currently disabled for
inline rotation mode. Enable traffic shaper if inline prefill
bandwidth is specified by inline rotation command.

Change-Id: Ie574ccbe2d57f838c59725b28baa2a51672f5829
Signed-off-by: Alan Kwong <akwong@codeaurora.org>