dt-bindings: hwmon: ti,tmp102: document optional V+ supply property

TMP102 is powered by its V+ supply, document it. The property is called
"vcc-supply" since the plus sign (+) is not a valid property character.

Signed-off-by: Peter Korsgaard <[e-mail]>
Reviewed-by: Rob Herring (Arm) <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Guenter Roeck <[e-mail]>

Documentation/devicetree/bindings/hwmon/ti,tmp102.yaml

···
   "#thermal-sensor-cells":
     const: 1
 
+  vcc-supply:
+    description: Power supply for tmp102
+
 required:
   - compatible
   - reg
···
             reg = <0x48>;
             interrupt-parent = <&gpio7>;
             interrupts = <16 IRQ_TYPE_LEVEL_LOW>;
+            vcc-supply = <&supply>;
             #thermal-sensor-cells = <1>;
         };
     };