usb: Add Interface Association Descriptor descriptor type

Signed-off-by: NBrad Hards <bradh@frogmouth.net>
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

hw/usb.h

@@ -124,6 +124,7 @@
 #define USB_DT_ENDPOINT			0x05
 #define USB_DT_DEVICE_QUALIFIER         0x06
 #define USB_DT_OTHER_SPEED_CONFIG       0x07
+#define USB_DT_INTERFACE_ASSOC          0x0B
 
 #define USB_ENDPOINT_XFER_CONTROL	0
 #define USB_ENDPOINT_XFER_ISOC		1