dt-bindings: vendor-prefixes: Add Sunplus

Add vendor prefix for Sunplus Technology Co., Ltd. (http://www.sunplus.com)
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Qin Jian <qinjian@cqplus1.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/2e74a1339a5ea54d92fdc4d1998a2b169e23b82b.1640154492.git.qinjian@cqplus1.com

Documentation/devicetree/bindings/vendor-prefixes.yaml

@@ -1155,6 +1155,8 @@ patternProperties:
     description: Summit microelectronics
   "^sunchip,.*":
     description: Shenzhen Sunchip Technology Co., Ltd
+  "^sunplus,.*":
+    description: Sunplus Technology Co., Ltd.
   "^SUNW,.*":
     description: Sun Microsystems, Inc
   "^supermicro,.*":