msm: mdss: hdmi: s3d mode support

Add sysfs node s3d_mode for stereo 3d support,
configure vendor info frame when 3d mode is set and
current video mode can support it. Output edid_3d_modes
in sysfs node in correct format.
Set 1 to s3d_mode will enable side by side, 2 for top
bottom, 3 for framepacking, 0 for 2d.

Change-Id: I634da4ffbd4e7994113d805c3c8facef3c9a5a25
Signed-off-by: Ken Zhang <kenz@codeaurora.org>
Signed-off-by: Veera Sundaram Sankaran <veeras@codeaurora.org>