drm/uapi: Add a warning that mode flags must match the xrandr definitions

Existing userspace expected the mode flags to match the xrandr
definitions 1:1, and even adding new flags in he previously unused
bits is likely to break existing userspace. Add a comment warning
people about this potential trap.

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]>
Signed-off-by: Ville Syrjälä <[email protected]>
Signed-off-by: Daniel Vetter <[email protected]>
Link: http://patchwork.freedesktop.org/patch/msgid/[email protected]

0 files changed, 0 insertions, 0 deletions