dt-bindings: add vendor prefix for OzzMaker and Waveshare Electronics

Add vendor prefix for OzzMaker [1] and Waveshare Electronics [2]
Both are display manufacturers

[1] https://ozzmaker.com/about/
[2] https://www.waveshare.com/contact_us



Signed-off-by: Kamlesh Gurudasani <kamlesh.gurudasani@gmail.com>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Rob Herring <robh@kernel.org>