mb/lenovo/x230: Turn X230 into a variant

Other variants would be added later.

Change-Id: Ic6af14f0aa7a6f7378048f3c38d5713c18950366
Signed-off-by: Bill XIE <persmule@hardenedlinux.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/41509
Reviewed-by: Alexander Couzens <lynxis@fe80.eu>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/mainboard/lenovo/x230/devicetree.cb b/src/mainboard/lenovo/x230/devicetree.cb
index e34734c..3a8e5fe8 100644
--- a/src/mainboard/lenovo/x230/devicetree.cb
+++ b/src/mainboard/lenovo/x230/devicetree.cb
@@ -58,8 +58,6 @@
 			register "gen2_dec" = "0x0c15e1"
 			register "gen4_dec" = "0x0c06a1"
 
-			register "pcie_hotplug_map" = "{ 0, 0, 1, 0, 0, 0, 0, 0 }"
-
 			register "xhci_switchable_ports" = "0xf"
 			register "superspeed_capable_ports" = "0xf"
 			register "xhci_overcurrent_mapping" = "0x4000201"
@@ -89,9 +87,7 @@
 				end
 			end # PCIe Port #1
 			device pci 1c.1 on end # PCIe Port #2
-			device pci 1c.2 on
-				smbios_slot_desc "7" "3" "ExpressCard Slot" "8"
-			end # PCIe Port #3 (expresscard)
+			device pci 1c.2 off end # PCIe Port #3
 			device pci 1c.3 off end # PCIe Port #4
 			device pci 1c.4 off end # PCIe Port #5
 			device pci 1c.5 off end # PCIe Port #6
@@ -136,7 +132,6 @@
 					register "event7_enable" = "0x01"
 					register "event8_enable" = "0x7b"
 					register "event9_enable" = "0xff"
-					register "eventa_enable" = "0x01"
 					register "eventb_enable" = "0x00"
 					register "eventc_enable" = "0xff"
 					register "eventd_enable" = "0xff"