disp: msm: sde: remove feature from dirty list on validate failure

Remove feature from dirty list when feature validation fails.
This fixes recovery failure when feature validation fails in
atomic check operation.

Change-Id: I9a884520544c85d0f8ca6a954657f76b37856ad3
Signed-off-by: Anjaneya Prasad Musunuri <aprasad@codeaurora.org>