drm/msm/dp: do not override plug orientation in simulation

In case of hot plug simulation, as the cable remains connected,
its orientation is not going to change. Do not update the orientation
using debug module to avoid unnecessary AUX failures.

Change-Id: I3881847b8fbfed60d23347dc5c6f88f0d9b5b27e
Signed-off-by: Ajay Singh Parmar <aparmar@codeaurora.org>