dt-bindings: vendor-prefixes: Add abt vendor prefix

Add prefix for ShenZhen Asia Better Technology Ltd.

Signed-off-by: Paul Cercueil <[e-mail]>
Reviewed-by: Sam Ravnborg <[e-mail]>
Acked-by: Rob Herring <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

Documentation/devicetree/bindings/vendor-prefixes.yaml

···
     description: Abilis Systems
   "^abracon,.*":
     description: Abracon Corporation
+  "^abt,.*":
+    description: ShenZhen Asia Better Technology Ltd.
   "^acer,.*":
     description: Acer Inc.
   "^acme,.*":