dt-bindings: Fix phandle-array issues in the idle-states bindings

As per 39bd2b6a ("dt-bindings: Improve phandle-array schemas"), the
phandle-array bindings have been disambiguated.  This fixes the new
RISC-V idle-states bindings to comply with the schema.

Fixes: 1bd524f7 ("dt-bindings: Add common bindings for ARM and RISC-V idle states")
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>

Documentation/devicetree/bindings/cpu/idle-states.yaml

@@ -719,8 +719,8 @@ examples:
             reg = <0x0>;
             riscv,isa = "rv64imafdc";
             mmu-type = "riscv,sv48";
-            cpu-idle-states = <&CPU_RET_0_0 &CPU_NONRET_0_0
-                            &CLUSTER_RET_0 &CLUSTER_NONRET_0>;
+            cpu-idle-states = <&CPU_RET_0_0>, <&CPU_NONRET_0_0>,
+                            <&CLUSTER_RET_0>, <&CLUSTER_NONRET_0>;
 
             cpu_intc0: interrupt-controller {
                 #interrupt-cells = <1>;
@@ -735,8 +735,8 @@ examples:
             reg = <0x1>;
             riscv,isa = "rv64imafdc";
             mmu-type = "riscv,sv48";
-            cpu-idle-states = <&CPU_RET_0_0 &CPU_NONRET_0_0
-                            &CLUSTER_RET_0 &CLUSTER_NONRET_0>;
+            cpu-idle-states = <&CPU_RET_0_0>, <&CPU_NONRET_0_0>,
+                            <&CLUSTER_RET_0>, <&CLUSTER_NONRET_0>;
 
             cpu_intc1: interrupt-controller {
                 #interrupt-cells = <1>;
@@ -751,8 +751,8 @@ examples:
             reg = <0x10>;
             riscv,isa = "rv64imafdc";
             mmu-type = "riscv,sv48";
-            cpu-idle-states = <&CPU_RET_1_0 &CPU_NONRET_1_0
-                            &CLUSTER_RET_1 &CLUSTER_NONRET_1>;
+            cpu-idle-states = <&CPU_RET_1_0>, <&CPU_NONRET_1_0>,
+                            <&CLUSTER_RET_1>, <&CLUSTER_NONRET_1>;
 
             cpu_intc10: interrupt-controller {
                 #interrupt-cells = <1>;
@@ -767,8 +767,8 @@ examples:
             reg = <0x11>;
             riscv,isa = "rv64imafdc";
             mmu-type = "riscv,sv48";
-            cpu-idle-states = <&CPU_RET_1_0 &CPU_NONRET_1_0
-                            &CLUSTER_RET_1 &CLUSTER_NONRET_1>;
+            cpu-idle-states = <&CPU_RET_1_0>, <&CPU_NONRET_1_0>,
+                            <&CLUSTER_RET_1>, <&CLUSTER_NONRET_1>;
 
             cpu_intc11: interrupt-controller {
                 #interrupt-cells = <1>;

Documentation/devicetree/bindings/riscv/cpus.yaml

@@ -101,6 +101,8 @@ properties:
 
   cpu-idle-states:
     $ref: '/schemas/types.yaml#/definitions/phandle-array'
+    items:
+      maxItems: 1
     description: |
       List of phandles to idle state nodes supported
       by this hart (see ./idle-states.yaml).