[S] Change in coreboot[main]: sb/intel/bd82x6x/early_usb: Add USB TX/RX gains

[Patrick Rudolph (Code Review)]

Attention is currently required from: Keith Hui, Patrick Rudolph, Paul Menzel.

Hello Keith Hui, Paul Menzel, build bot (Jenkins),

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

https://review.coreboot.org/c/coreboot/+/78829?usp=email

to look at the new patch set (#9).

The following approvals got outdated and were removed:
Verified+1 by build bot (Jenkins)

Change subject: sb/intel/bd82x6x/early_usb: Add USB TX/RX gains
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sb/intel/bd82x6x/early_usb: Add USB TX/RX gains

Describe the USB 'current' settings based on MRC.bin that converts
the USB trace length to a predefined register value.
MRC.bin decides which setting to use based on the PC type, mobile
or desktop, and the trace length.

Tested:	Lenovo X220 still boots.

Change-Id: I79d35ca16818daec03ee7f464349a4c8ee0f78e4
Signed-off-by: Patrick Rudolph 
---
M src/southbridge/intel/bd82x6x/early_usb.c
M src/southbridge/intel/bd82x6x/pch.h
2 files changed, 19 insertions(+), 6 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/29/78829/9