dt-bindings: display: Fix lvds.yaml references

The trailing "/" in "lvds.yaml/#" is not a valid JSON pointer. The existing
jsonschema package allows it, but coming changes make allowed "$ref" URIs
stricter.

Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Link: https://lore.kernel.org/r/20230418150658.1535120-1-robh@kernel.org


Signed-off-by: Rob Herring <robh@kernel.org>