dt-bindings: riscv: Document cbop-block-size

Following the examples of cbom-block-size and cboz-block-size,
cbop-block-size is the cache size of Zicbop (cbo.prefetch) operations.
The most common case is to have all cache block sizes to be the same
size (e.g. profiles such as rva22u64 mandates a 64 bytes size for all
cache operations), but there's no specification requirement for that,
and an implementation can have different cache sizes for each operation.

Cc: Rob Herring <[email protected]>
Cc: Conor Dooley <[email protected]>
Signed-off-by: Daniel Henrique Barboza <[email protected]>
Acked-by: Conor Dooley <[email protected]>
Reviewed-by: Andrew Jones <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Palmer Dabbelt <[email protected]>

Author: danielhb

Documentation/devicetree/bindings/riscv/cpus.yaml

@@ -80,6 +80,11 @@ properties:
     description:
       The blocksize in bytes for the Zicbom cache operations.
 
+  riscv,cbop-block-size:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      The blocksize in bytes for the Zicbop cache operations.
+
   riscv,cboz-block-size:
     $ref: /schemas/types.yaml#/definitions/uint32
     description: