drm/msm/dp: break aux transfer retry loop if timed-out

In case of AUX transaction timeout in debug mode, abort
the transaction so that DP can break out of the re-try logic.
The timeout can happen if the simulation scripts is abruptly
stopped. In that case, bring the DP driver to a stable state
instead of re-trying AUX and timing out.

Change-Id: Iad8e0455692ef8adaa011629a9b67a2ef4e37de4
Signed-off-by: Ajay Singh Parmar <aparmar@codeaurora.org>