dt-bindings: document access-controllers property for coresight peripherals

Document the access-controllers for coresight peripherals in case some
access checks need to be performed to use them.

Signed-off-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Acked-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20260226-debug_bus-v6-1-5d794697798d@foss.st.com
Signed-off-by: Alexandre Torgue <alexandre.torgue@foss.st.com>

Documentation/devicetree/bindings/arm/arm,coresight-cti.yaml

@@ -128,6 +128,9 @@ properties:
   "#address-cells":
     const: 1
 
+  access-controllers:
+    maxItems: 1
+
 patternProperties:
   '^trig-conns@([0-9]+)$':
     type: object

Documentation/devicetree/bindings/arm/arm,coresight-dynamic-funnel.yaml

@@ -78,6 +78,9 @@ properties:
         description: Output connection to CoreSight Trace bus
         $ref: /schemas/graph.yaml#/properties/port
 
+  access-controllers:
+    maxItems: 1
+
 required:
   - compatible
   - reg

Documentation/devicetree/bindings/arm/arm,coresight-etm.yaml

@@ -118,6 +118,9 @@ properties:
         description: Output connection from the ETM to CoreSight Trace bus.
         $ref: /schemas/graph.yaml#/properties/port
 
+  access-controllers:
+    maxItems: 1
+
 required:
   - compatible
   - clocks

Documentation/devicetree/bindings/arm/arm,coresight-stm.yaml

@@ -73,6 +73,9 @@ properties:
         description: Output connection to the CoreSight Trace bus.
         $ref: /schemas/graph.yaml#/properties/port
 
+  access-controllers:
+    maxItems: 1
+
 required:
   - compatible
   - reg

Documentation/devicetree/bindings/arm/arm,coresight-tmc.yaml

@@ -128,6 +128,9 @@ properties:
       - const: tracedata
       - const: metadata
 
+  access-controllers:
+    maxItems: 1
+
 required:
   - compatible
   - reg

Documentation/devicetree/bindings/arm/arm,coresight-tpiu.yaml

@@ -70,6 +70,9 @@ properties:
         description: Input connection from the CoreSight Trace bus.
         $ref: /schemas/graph.yaml#/properties/port
 
+  access-controllers:
+    maxItems: 1
+
 required:
   - compatible
   - reg