[coreboot-gerrit] Change in coreboot[master]: libpayload/usb: add USB 3.1 GEN2 support

[EricR Lai (Code Review)]

Hello Julius Werner, Duncan Laurie, build bot (Jenkins), Furquan Shaikh,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/35023

to look at the new patch set (#3).

Change subject: libpayload/usb: add USB 3.1 GEN2 support
......................................................................

libpayload/usb: add USB 3.1 GEN2 support

USB 3.1 GEN2 report speed type 4, add into speed enum.

BUG=b:139787920
BRANCH=N/A
TEST=Build libpayload and depthcharge on sarien and boot with
USB GEN2 HUB with USB disk. Check ultra speed device in cbmem log.

Signed-off-by: Eric Lai 
Change-Id: Ia0ef12b2f0d91bf0d0db766bbc9019de1614a4f4
---
M payloads/libpayload/drivers/usb/usb.c
M payloads/libpayload/drivers/usb/usbhub.c
M payloads/libpayload/drivers/usb/xhci_devconf.c
M payloads/libpayload/include/usb/usb.h
4 files changed, 19 insertions(+), 6 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/23/35023/3