dt-bindings: vendor-prefix: Add prefix for Voltafield

Voltafile Technology Corp. is a company that produces MEMS sensors.

Add a DT vendor prefix for it.

Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
Signed-off-by: Ondřej Jirman <megi@xff.cz>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240222011341.3232645-2-megi@xff.cz


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