drm/msm/dp: abort aux and ctrl when simulation is switched off

While running the DisplayPort simulation, if the simulation is
abruptly switched off, AUX and CTRL may continue processing
like in a normal DisplayPort connected mode. This may result
in an unstable DP driver state and may affect subsequent hot
plugs.
Abort the AUX and CTRL processing when DP simulation is
switched off. This brings the DP driver into stable state when
simulation is switched off.

Change-Id: Ib243b0628e1c642ec2f50adfaa17ca3aebdc2687
Signed-off-by: Ajay Singh Parmar <aparmar@codeaurora.org>
Signed-off-by: Tatenda Chipeperekwa <tatendac@codeaurora.org>