dt-bindings: usb: mtu3: add support 'resets' property

Add 'resets' property to support IP reset usually by top pericfg.
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/20220523090449.14430-2-chunfeng.yun@mediatek.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Documentation/devicetree/bindings/usb/mediatek,mtu3.yaml

@@ -107,6 +107,9 @@ properties:
   maximum-speed:
     enum: [super-speed-plus, super-speed, high-speed, full-speed]
 
+  resets:
+    maxItems: 1
+
   "#address-cells":
     enum: [1, 2]