AMD Thatcher: Fix PCIE link issues

1). Thatcher PCIE x8 slot is reverse order.
Although the PCIE slot is x16, it actually uses 8 lanes(15:8).
Because the PCIE slot is configured by PortList[0], fix this item can enable the slot.
A x1 PCIE network adapter works well in this slot.

2). Fix DdiList to detect DP monitor or HDMI monitor.
GPIO50 can be used to detect DP0/HDMI0 monitor.
If GPIO50 is 1, it is DP monitor. If GPIO50 is 0, it is HDMI monitor.
GPIO51 can be used to detect DP1/HDMI1 in the same way.

3). Disable unused PCIE port and clean up code in PlatformGnbPcie.c and devicetree.cb.
PCIE port 3 and 7 are not used in Thatcher.

Change-Id: I8524b6fc1b6cdc03ba92e7191186bfb0986767c8
Signed-off-by: Siyuan Wang <SiYuan.Wang@amd.com>
Signed-off-by: Siyuan Wang <wangsiyuanbuaa@gmail.com>
Reviewed-on: http://review.coreboot.org/3011
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Martin Roth <martin.roth@se-eng.com>

0 files changed, 0 insertions, 0 deletions