msm: mdss: try recovering from pingpong timeout without panic

In the current implementation, as soon as the ping pong timeout
happens, driver dumps the relevant logs for debugging and panic.
It is possible to recover from this situation without panic by
performing MDSS control reset and panel write pointer reset. This
change tries to recover from pingpong timeout. If the recovery
is not successful for 10 consecutive frames, uevent is sent to
HAL layer for performing blank and unblank of display driver.

Change-Id: Iadc929a79a62bbf222b9022af5cf04f870079ded
Signed-off-by: Jeevan Shriram <jshriram@codeaurora.org>