msm: mdss: fix the display reset error

Increase the dma stop time out value as stopping operation
may take longer than the previous defined value. Gracefully
handle the time out condition to allow it to retry when
the next frame comes in.

Change-Id: I5120f309db2dbaeebef3b2878caa13cec17c9e1f
Signed-off-by: Xiaoming Zhou <zhoux@codeaurora.org>