ASoC: dt-bindings: irondevice,sma1303.yaml: Fix about breaking the checks

Fix the bindings checks like syntax error.

Signed-off-by: Kiseok Jo <kiseok.jo@irondevice.com>
Reported-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20230131050946.14385-1-kiseok.jo@irondevice.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/sound/irondevice,sma1303.yaml

@@ -19,14 +19,13 @@ required:
   - compatible
   - reg
 
-additionalProperties: true
+additionalProperties: false
 
 examples:
   - |
-    #include <dt-bindings/gpio/gpio.h>
     i2c_bus {
-		sma1303_amp: sma1303@1e {
-			compatible = "irondevice,sma1303";
-			reg = <0x1e>;
-		};
-	};
+        amplifier@1e {
+            compatible = "irondevice,sma1303";
+            reg = <0x1e>;
+        };
+    };