intel/skylake: Add USB2 port config for max settings

Add a new USB2_PORT_MAX with the max possible settings
(56mV) for the TX and Pre-emphasis bias values.  Also fix
the settings for the detachable tablet config to match the
skylake HSIO tuning guide as it was incorrect before.

BUG=chrome-os-partner:45367
BRANCH=none
TEST=build and boot on glados

Change-Id: Id9ccc683fe92c962095347e0d1a0afeb082c821f
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: e5d56831e75f98a3c75ed333e4b79b1a37f14792
Original-Change-Id: Ia2e3e93236f1463201f83a1cae28349de2836110
Original-Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/308729
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/12203
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
1 file changed