msm: mdss: fix display time out when taking ESD test

Currently, Command engine will be blocked when sending
display off command in ESD test. Root cause is
panel BTA will affect DSI status. Reset dsi driver
when command engine is blocked.

Change-Id: I729b079d2becfad60630fc941d36199f95618eab
Signed-off-by: Shuo Yan <shuoy@codeaurora.org>