ASoC: dt-bindings: designware-i2s: add optional resets

Some SoC may have resets for I2S subsystem. So add optional resets support.

Signed-off-by: Maxim Kochetkov <fido_max@inbox.ru
Link: https://lore.kernel.org/r/20230504071618.52012-2-fido_max@inbox.ru
Signed-off-by: Mark Brown <broonie@kernel.org

Documentation/devicetree/bindings/sound/snps,designware-i2s.yaml

@@ -36,7 +36,8 @@ properties:
     const: i2sclk
 
   resets:
-    maxItems: 1
+    items:
+      - description: Optional controller resets
 
   dmas:
     items: