msm: mdss: allow overlay set to recover on 8x10

In the cases where the UI framework was shut down
abnormally, the previous overlay resource was not
released.  This is to allow recovery in the error
cases.

Change-Id: I354044bb2a0af0df1dc8a7dcec280fa0dcd103fa
Signed-off-by: Xiaoming Zhou <zhoux@codeaurora.org>