dt-bindings: add vendor prefix for YIC System Co., Ltd

Add vendor prefix for YIC System Co., Ltd (http://www.yicsystem.com).

Signed-off-by: Krzysztof Kozlowski <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Rob Herring <[e-mail]>

Documentation/devicetree/bindings/vendor-prefixes.yaml

···
     description: Yamaha Corporation
   "^yes-optoelectronics,.*":
     description: Yes Optoelectronics Co.,Ltd.
+  "^yic,.*":
+    description: YIC System Co., Ltd.
   "^ylm,.*":
     description: Shenzhen Yangliming Electronic Technology Co., Ltd.
   "^yna,.*":