Revert "drm: Add and handle new aspect ratios in DRM layer"

Revert "drm: Add and handle new aspect ratios in DRM layer"

This reverts commit a68362fe3e84fcbedd49939aa200519aa5410135.

Adding new mode flags willy nilly breaks existing userspace. We need to
coordinate this better, potentially with a new client cap that only
exposes the aspect ratio flags when userspace is prepared for them
(similar to what we do with stereo 3D modes).

Cc: Shashank Sharma <[email protected]>
Cc: Lin, Jia <[email protected]>
Cc: Akashdeep Sharma <[email protected]>
Cc: Jim Bride <[email protected]>
Cc: Jose Abreu <[email protected]>
Cc: Daniel Vetter <[email protected]>
Cc: Emil Velikov <[email protected]>
Cc: Daniel Vetter <[email protected]>
Signed-off-by: Ville Syrjälä <[email protected]>
Signed-off-by: Daniel Vetter <[email protected]>
Link: http://patchwork.freedesktop.org/patch/msgid/[email protected]