dt-bindings: vendor-prefixes: Add Shanghai Top Display Optolelectronics vendor prefix

Shanghai Top Display Optolelectronics Co., Ltd  is a display manufacturer
from Shanghai.
Web site of the company: http://www.shtdo.com/Signed-off-by: NNeil Armstrong <narmstrong@baylibre.com>
Reviewed-by: NSam Ravnborg <sam@ravnborg.org>
Acked-by: NRob Herring <robh@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200915121912.4347-2-narmstrong@baylibre.com

Documentation/devicetree/bindings/vendor-prefixes.yaml

@@ -1037,6 +1037,8 @@ patternProperties:
     description: Trusted Computing Group
   "^tcl,.*":
     description: Toby Churchill Ltd.
+  "^tdo,.*":
+    description: Shangai Top Display Optoelectronics Co., Ltd
   "^technexion,.*":
     description: TechNexion
   "^technologic,.*":