dt-bindings: vendor-prefixes: sort entries alphabetically

Sort entries alphabetically.  This was a semi manual job with help of:

  cat Documentation/devicetree/bindings/vendor-prefixes.yaml | grep '":' > old
  cat old | sort > new
  diff -ubB old new

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20221202110536.22230-1-krzysztof.kozlowski@linaro.org


Signed-off-by: Rob Herring <robh@kernel.org>