msm: mdss: add return values to MDSS recovery events

When the target is in suspend or when shutdown is pending,
the DSI recovery need not be taken care of. Add change to
handle this case based on the return value of the MDSS
recovery events.

Change-Id: I5a5cd6743c15cca7ca42a40db7dcd552c95b20b6
Signed-off-by: Padmanabhan Komanduru <pkomandu@codeaurora.org>
Signed-off-by: Ashish Garg <ashigarg@codeaurora.org>