staging: hikey9xx: hisilicon, hisi-spmi-controller.yaml fix bindings

Fix a few warnings produced by make dt_binding_check.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/fca7260e7c61f073ae376ab23f58856ba5a87a7a.1611212783.git.mchehab+huawei@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/hikey9xx/hisilicon,hisi-spmi-controller.yaml

@@ -26,14 +26,22 @@ properties:
   reg:
     maxItems: 1
 
+  "#address-cells":
+    const: 2
+
+  "#size-cells":
+    const: 0
+
   spmi-channel:
     description: |
       number of the Kirin 970 SPMI channel where the SPMI devices are connected.
 
 required:
- - compatible
- - reg
- - spmi-channel
+  - compatible
+  - reg
+  - spmi-channel
+  - "#address-cells"
+  - "#size-cells"
 
 patternProperties:
   "^pmic@[0-9a-f]$":
@@ -43,6 +51,8 @@ patternProperties:
       are documented at
       drivers/staging/hikey9xx/hisilicon,hi6421-spmi-pmic.yaml.
 
+additionalProperties: false
+
 examples:
   - |
     bus {
@@ -51,11 +61,14 @@ examples:
 
       spmi: spmi@fff24000 {
         compatible = "hisilicon,kirin970-spmi-controller";
+        #address-cells = <2>;
+        #size-cells = <0>;
         status = "ok";
         reg = <0x0 0xfff24000 0x0 0x1000>;
         spmi-channel = <2>;
 
         pmic@0 {
+          reg = <0 0>;
           /* pmic properties */
         };
       };