dt-bindings: Add "vot" vendor prefix

This adds a vendor prefix "vot" for Vision Optical Technology Co., Ltd.
They make LCD displays.

Signed-off-by: David Lechner <[e-mail]>
Reviewed-by: Rob Herring <[e-mail]>
Signed-off-by: Noralf Trønnes <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

Documentation/devicetree/bindings/vendor-prefixes.txt

···
 vivante	Vivante Corporation
 vocore VoCore Studio
 voipac	Voipac Technologies s.r.o.
+vot	Vision Optical Technology Co., Ltd.
 wd	Western Digital Corp.
 wetek	WeTek Electronics, limited.
 wexler	Wexler