Don't send the SuperSpeed USB Device Capability descriptor if
the gadget is not capable of SuperSpeed.
Signed-off-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NSevak Arakelyan <sevaka@synopsys.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>