msm: mdss: fix adaptive variable refresh and dynamic fps concurrency

Store the avr vtotal information computed from the initial timing
information and use it to restore the register values to avoid
flickering issues during suspend/resume usecase.

CRs-Fixed: 1056610
Change-Id: I8c7d27a062b90a3f200904f0ba20fbdb0bb32d70
Signed-off-by: Ramkumar Radhakrishnan <ramkumar@codeaurora.org>