hwc: prevent bandwidth calculation in GPU fall-back case

    In prepare, we check if MDP can handle the number of layers
    given to it. If it cannot, we fall-back. Additionally, we must
    not proceed with any MDP bytes calculations otherwise we will
    see out of bounds errors.

Change-Id: Ifae45aefbc8732a7f21f5652758ece3a7639be9a
1 file changed