dt-bindings: Add vendor prefix for techstar

Add vendor prefix for techstar, known as
Shenzhen Techstar Electronics Co., Ltd. a known producer for LCD modules.
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Signed-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/vendor-prefixes.txt

@@ -390,6 +390,7 @@ tcl	Toby Churchill Ltd.
 technexion	TechNexion
 technologic	Technologic Systems
 tempo	Tempo Semiconductor
+techstar	Shenzhen Techstar Electronics Co., Ltd.
 terasic	Terasic Inc.
 thine	THine Electronics, Inc.
 ti	Texas Instruments