[S] Change in coreboot[main]: mb/lenovo/x220: Update devicetree

[Patrick Rudolph (Code Review)]

Attention is currently required from: Alexander Couzens.

Patrick Rudolph has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/78291?usp=email )

Change subject: mb/lenovo/x220: Update devicetree
......................................................................

mb/lenovo/x220: Update devicetree

- Disable unconnected PCH PCIe ports 1 + 3.
- Add smbios_slot_desc to WLAN PCIe port
- Add comment for PCIe port 7 that might have a
  XHCI controller connected (some variants only).

Test: Lenovo X220 still boots and all devices are still working
      fine. The WLAN slot is shown in dmidecode -t 9.

Change-Id: I3fdfbb7ad30e2ff8a289d9055eaef0557475fdff
Signed-off-by: Patrick Rudolph 
---
M src/mainboard/lenovo/x220/devicetree.cb
1 file changed, 7 insertions(+), 4 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/91/78291/1

diff --git a/src/mainboard/lenovo/x220/devicetree.cb b/src/mainboard/lenovo/x220/devicetree.cb
index 7a99599..4c8c12f 100644
--- a/src/mainboard/lenovo/x220/devicetree.cb
+++ b/src/mainboard/lenovo/x220/devicetree.cb
@@ -57,9 +57,12 @@
    		end # Intel Gigabit Ethernet
    		device ref ehci2 on end # USB2 EHCI #2
    		device ref hda on end # High Definition Audio
-			device ref pcie_rp1 on end # PCIe Port #1
-			device ref pcie_rp2 on end # PCIe Port #2 (wlan)
-			device ref pcie_rp3 on end # PCIe Port #3
+			device ref pcie_rp1 off end # PCIe Port #1
+			device ref pcie_rp2 on # PCIe Port #2 (wlan)
+				smbios_slot_desc "SlotTypeM2Socket1_SD" "SlotLengthShort"
+					"WIFI" "SlotDataBusWidth1X"
+			end
+			device ref pcie_rp3 off end # PCIe Port #3
    		device ref pcie_rp4 on
    			smbios_slot_desc "7" "3" "ExpressCard Slot" "8"
    		end # PCIe Port #4
@@ -71,7 +74,7 @@
    			end
    		end # PCIe Port #5 (SD)
    		device ref pcie_rp6 off end # PCIe Port #6
-			device ref pcie_rp7 on end # PCIe Port #7
+			device ref pcie_rp7 on end # PCIe Port #7 Optional XHCI controller
    		device ref pcie_rp8 off end # PCIe Port #8
    		device ref ehci1 on end # USB2 EHCI #1
    		device ref pci_bridge off end # PCI bridge