Tiger Lake UP3 PCH close usb3.0

tiger lake platforms, PCH uses Intel® 500 Series Chipset Family，the usb mapping is as follows

question : how to turn off usb3.0 only and keep usb2.0 in os system.

UP3_HSIO		0	1	2	3
功能1 （6个控制器）		PCIE X1	PCIE X1	PCIE X1	PCIE X1
		PCIE X2		PCIE X2
		PCIE X4
功能2		USB 3.0	USB 3.0	USB 3.0	USB 3.0
分配		USB HUB	USB HUB	5G	4G/5G
备注
UP3_USB2		1	2	3	4	5	6	7	8	9	10
功能		USB 2.0	USB 2.0	USB 2.0	USB 2.0	USB 2.0	USB 2.0	USB 2.0	USB 2.0	USB 2.0	USB 2.0
分配		NC	NC	4G/5G	NC	NC	USB HUB	USB HUB	XR21V1410	XR21V1410	NC
备注									usb to uart