dt-bindings: iio: minor whitespace cleanups

Drop redundant blank lines and add such when needed.
Signed-off-by: NKrzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: NRob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20230124081037.31013-2-krzysztof.kozlowski@linaro.orgSigned-off-by: NJonathan Cameron <Jonathan.Cameron@huawei.com>

Documentation/devicetree/bindings/iio/dac/adi,ad5380.yaml

@@ -12,6 +12,7 @@ maintainers:
 
 description: |
   DAC devices supporting both SPI and I2C interfaces.
+
 properties:
   compatible:
     enum:

Documentation/devicetree/bindings/iio/proximity/google,cros-ec-mkbp-proximity.yaml

 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
 %YAML 1.2
 ---
-
 $id: http://devicetree.org/schemas/iio/proximity/google,cros-ec-mkbp-proximity.yaml#
 $schema: http://devicetree.org/meta-schemas/core.yaml#