spi: Few cleanups while looking at num-cs

Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com> says:

Few minor cleanups for DT bindings and Andes driver.

Patches do not have inter-dependencies.

Link: https://patch.msgid.link/20260804-spi-num-cs-v1-0-4ccb13dcc7b0@oss.qualcomm.com

Documentation/devicetree/bindings/spi/andestech,ae350-spi.yaml

@@ -24,10 +24,6 @@ properties:
   clocks:
     maxItems: 1
 
-  num-cs:
-    description: Number of chip selects supported
-    maxItems: 1
-
   dmas:
     items:
       - description: Transmit FIFO DMA channel

Documentation/devicetree/bindings/spi/axiado,ax3000-spi.yaml

@@ -37,7 +37,6 @@ properties:
   num-cs:
     description: |
       Number of chip selects used.
-    $ref: /schemas/types.yaml#/definitions/uint32
     minimum: 1
     maximum: 4
     default: 4

Documentation/devicetree/bindings/spi/marvell,armada-3700-spi.yaml

@@ -28,9 +28,6 @@ properties:
   clocks:
     maxItems: 1
 
-  num-cs:
-    maxItems: 1
-
 required:
   - compatible
   - reg

Documentation/devicetree/bindings/spi/spi-cadence.yaml

@@ -43,7 +43,6 @@ properties:
       Number of chip selects used. If a decoder is used,
       this will be the number of chip selects after the
       decoder.
-    $ref: /schemas/types.yaml#/definitions/uint32
     minimum: 1
     maximum: 4
     default: 4

drivers/spi/spi-atcspi200.c

@@ -638,7 +638,6 @@ static int atcspi_resume(struct device *dev)
 static DEFINE_SIMPLE_DEV_PM_OPS(atcspi_pm_ops, atcspi_suspend, atcspi_resume);
 
 static const struct of_device_id atcspi_of_match[] = {
-	{ .compatible = "andestech,qilai-spi", },
 	{ .compatible = "andestech,ae350-spi", },
 	{ /* sentinel */ }
 };