fbdev: msm: Add snapshot of display framebuffer driver

This is snapshot of the framebuffer driver as of msm-3.18
commit 2166ef69044c ("msm: mdss: Signal outstanding
fences when panel is dead").

Change-Id: I558bb25cbb26ff1ca2b4f79a0e98162bb1992241
Signed-off-by: Sachin Bhayare <sachin.bhayare@codeaurora.org>