dt-bindings: vendor-prefixes: add Enclustra

Add vendor prefix for Enclustra GmbH (https://www.enclustra.com

).

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220406160728.720902-1-krzysztof.kozlowski@linaro.org