spi: dt-bindings: socionext,uniphier: drop address/size-cells

Remove address/size-cells because they are already mentioned by common
spi-controller.yaml.

Signed-off-by: Krzysztof Kozlowski <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

Documentation/devicetree/bindings/spi/socionext,uniphier-spi.yaml

···
   - $ref: spi-controller.yaml#
 
 properties:
-  "#address-cells": true
-  "#size-cells": true
-
   compatible:
     const: socionext,uniphier-scssi