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.org


Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>