dt-bindings: mtd: nand: Add nand-randomizer property

Add the 'nand-randomizer' property to control the data randomizer
feature. This is used to improve data reliability by reducing
cell-to-cell interference.

Depending on the hardware architecture, this property is designed to be
generic and can apply to either the NAND chip's internal randomizer
or the hardware randomizer engine embedded in the NAND host controller.

This property is defined as a uint32 enum (0 or 1) instead of a simple
boolean. This design choice explicitly supports the "not present" case.
If the property is omitted, the driver will not interfere and will leave
the randomizer in its current state (e.g., as already configured by the
bootloader or hardware default).

Signed-off-by: Cheng Ming Lin <chengminglin@mxic.com.tw>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

Documentation/devicetree/bindings/mtd/nand-chip.yaml

@@ -23,6 +23,15 @@ properties:
     description:
       Contains the chip-select IDs.
 
+  nand-randomizer:
+    description: |
+      Control the data randomizer feature.
+      0: Disable randomizer.
+      1: Enable randomizer.
+      If absent, the current hardware state is left unchanged.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [0, 1]
+
 required:
   - reg