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

Hangzhou Silan Microelectronics Co., Ltd. (http://www.silan.com.cn/) is
a manufacturer of ICs, including MEMS sensors.
Signed-off-by: Samuel Holland <samuel@sholland.org>
Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20220202235049.8051-2-samuel@sholland.orgSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Documentation/devicetree/bindings/vendor-prefixes.yaml

@@ -1082,6 +1082,8 @@ patternProperties:
     description: Silicon Image
   "^silabs,.*":
     description: Silicon Laboratories
+  "^silan,.*":
+    description: Hangzhou Silan Microelectronics Co., Ltd.
   "^silead,.*":
     description: Silead Inc.
   "^silergy,.*":