[SeaBIOS] Unremovable USB3 device can not be detected after reboot

[Zheng Bao]

Hi, All,
My test environment.

Main Board: AMD Bettong
SeaBIOS: 1.8.0
USB3 device: USB MSC vendor='Seagate' product='FA GoFlex Pro' rev='0210' type=0 removable=0

The device can be detected at Seabios stage only when the board is power up first time.
If I press the reset button, it can not be detected.
I have to unplug, plug the power cable and power up again, the usb3 device can be detected.

Removable USB flash disk doesnt have that problem.

Zheng