dt-bindings: vendor-prefixes: Add Injoinic

Add prefix for Injoinic Technology Corp. (http://www.injoinic.com/

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Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Samuel Holland <samuel@sholland.org>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>