drm/msm/sde: perform debug dump before h/w recovery

Perform a single debug log and register dump before initiating
the first hardware recovery request in a series of failures,
rather than on each physical encoder as issues are detected.

Change-Id: Icf710679cf24897fe8aec1ab3ff13bdcb2d65e43
Signed-off-by: Clarence Ip <cip@codeaurora.org>