dt-bindings: display: convert osddisplays,osd101t2587-53ts to DT Schema

osddisplays,osd101t2587-53ts is compatible with panel-simple-dsi binding,
so list the compatible in the panel-simple-dsi binding file.

v2:
  - It is a DSI panel, move to -dsi binding (Tomi)

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Cc: Peter Ujfalusi <peter.ujfalusi@ti.com>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200408195109.32692-18-sam@ravnborg.org