msm: mdss: cleanup usage of panel info

Panel info is used to communicate between panel, mdp and framebuffer.
Currently framebuffer maintains its own copy of panel_info which might
cause mismatches on the latest information from panel. Change
framebuffer panel_info to be a pointer to information provided by panel
driver.

Change-Id: Ic7ae27564d98d6b6843d1368481dda0601befccf
Signed-off-by: Adrian Salido-Moreno <adrianm@codeaurora.org>
Signed-off-by: Ujwal Patel <ujwalp@codeaurora.org>