dt-bindings: memory-controllers: fsl,imx-weim: Fix "fsl,weim-cs-timing" schema

dt-bindings: memory-controllers: fsl,imx-weim: Fix "fsl,weim-cs-timing" schema

The "fsl,weim-cs-timing" property is an array, but the constraints in
the if/then schema are for a matrix. That worked fine when all
properties were decoded into a matrix, but now dtschema decodes
properties into scalars and arrays based on their type.

Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
Acked-by: Peng Fan <peng.fan@nxp.com>
Link: https://lore.kernel.org/r/20240807225959.3343093-1-robh@kernel.org
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>