peppy: Force enable ASPM on PCIe Root Port 1

(Clone of Falco change Ie2111e4bb70411aa697dc63c0c11f13fbe66c8d8)

Old-Change-Id: I5feba8fdbafba6d2de9f7d3de6170defc0d45a32
Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/66536
Reviewed-by: Dave Parker <dparker@chromium.org>
(cherry picked from commit b78a872a6647d7bb82f6c06a75e4075e451a1622)

peppy: Disable unused clocks

CLKOUT for PCIE ports 2-5 and CLKOUT_XDP are not used
and can be disabled.

This change was modled after the change made in Falco:
Falco-Change-Id: I0f996e90f0ae42780de3a0c8dc5db00ec600748b

The only difference per schematic for Peppy was PCIe 1 supports
a NGFF interface. PCIe 0 is connected to WLAN.

Old-Change-Id: Ib4871cb2655316cb260ab33ada6b9d81f271377f
Signed-off-by: Steven Sherk <steven.sherk@se-eng.com>
Reviewed-on: https://gerrit.chromium.org/gerrit/66693
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: Shawn Nematbakhsh <shawnn@chromium.org>
Commit-Queue: Shawn Nematbakhsh <shawnn@chromium.org>
(cherry picked from commit 8f12335013a510dee3c21b55251ab00c0fbac609)

Squashed two related commits.

Change-Id: Ibc5b902018eec07fdccaa8c6cb066ce918f6a6b5
Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com>
Reviewed-on: http://review.coreboot.org/6419
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
lenovo/t520/mainboard.c: Include header `h8.h` for prototype

Change-Id: I5ac6608ebf78f2d48bc7f68bce9eae7a2be82332
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: http://review.coreboot.org/6424
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>