google/snappy: enhance BigDaddy USB#2 2.0 strength

Fine tune 14" BigDaddy USB#2 2.0 strength:
PERPORTPETXISET: 7
PERPORTTXISET: 1
IUSBTXEMPHASISEN: 3
PERPORTTXPEHALF: 0

this value could have USB#2 2.0 EA/function pass.

BUG=b:72922816
BRANCH=reef
TEST=emerge-snappy coreboot
Change-Id: I0ea1b966b7c02c95bf0ea1138a5629fd3b576439
Signed-off-by: Kevin Chiu <Kevin.Chiu@quantatw.com>
Reviewed-on: https://review.coreboot.org/23649
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
1 file changed