DUE USB composite device field corrections (#14185)

Marlin/src/HAL/HAL_DUE/usb/udi_composite_desc.c

   .bLength                   = sizeof(usb_dev_desc_t),
   .bDescriptorType           = USB_DT_DEVICE,
   .bcdUSB                    = LE16(USB_V2_0),
-  .bDeviceClass              = 0,
-  .bDeviceSubClass           = 0,
-  .bDeviceProtocol           = 0,
+  .bDeviceClass              = CDC_CLASS_MULTI,
+  .bDeviceSubClass           = CDC_SUBCLASS_ACM,
+  .bDeviceProtocol           = CDC_PROTOCOL_V25TER,
   .bMaxPacketSize0           = USB_DEVICE_EP_CTRL_SIZE,
   .idVendor                  = LE16(USB_DEVICE_VENDOR_ID),
   .idProduct                 = LE16(USB_DEVICE_PRODUCT_ID),
   .bLength                   = sizeof(usb_dev_qual_desc_t),
   .bDescriptorType           = USB_DT_DEVICE_QUALIFIER,
   .bcdUSB                    = LE16(USB_V2_0),
-  .bDeviceClass              = 0,
-  .bDeviceSubClass           = 0,
-  .bDeviceProtocol           = 0,
+  .bDeviceClass              = CDC_CLASS_MULTI,
+  .bDeviceSubClass           = CDC_SUBCLASS_ACM,
+  .bDeviceProtocol           = CDC_PROTOCOL_V25TER,
   .bMaxPacketSize0           = USB_DEVICE_EP_CTRL_SIZE,
   .bNumConfigurations        = 1
 };

Marlin/src/HAL/HAL_DUE/usb/usb_protocol_cdc.h

 #define  CDC_CLASS_DEVICE     0x02	//!< USB Communication Device Class
 #define  CDC_CLASS_COMM       0x02	//!< CDC Communication Class Interface
 #define  CDC_CLASS_DATA       0x0A	//!< CDC Data Class Interface
+#define  CDC_CLASS_MULTI      0xEF      //!< CDC Multi-interface Function
+
 //@}
 
 //! \name USB CDC Subclass IDs