libusb: Add LIBUSB_DT_SUPERSPEED_HUB

Sponsored by:   The FreeBSD Foundation

lib/libusb/libusb.h

@@ -89,6 +89,7 @@ enum libusb_descriptor_type {
 	LIBUSB_DT_HUB = 0x29,
 	LIBUSB_DT_BOS = 0x0f,
 	LIBUSB_DT_DEVICE_CAPABILITY = 0x10,
+	LIBUSB_DT_SUPERSPEED_HUB = 0x2a,
 	LIBUSB_DT_SS_ENDPOINT_COMPANION = 0x30,
 };