mb/dell/snb_ivb_workstations: Fix SMBIOS slot desc for PCH PCIe ports

The PCH's PCIe ports do not support Gen3 speeds, only Gen1/Gen2.

Change-Id: I7df61af1953ec99000c6c501b017e553190a46b6
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/63206
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Singer <felixsinger@posteo.net>
diff --git a/src/mainboard/dell/snb_ivb_workstations/variants/optiplex_9010_sff/overridetree.cb b/src/mainboard/dell/snb_ivb_workstations/variants/optiplex_9010_sff/overridetree.cb
index 30167f9..bfe453f 100644
--- a/src/mainboard/dell/snb_ivb_workstations/variants/optiplex_9010_sff/overridetree.cb
+++ b/src/mainboard/dell/snb_ivb_workstations/variants/optiplex_9010_sff/overridetree.cb
@@ -4,7 +4,7 @@
 		chip southbridge/intel/bd82x6x # Intel Series 7 Panther Point PCH
 			register "sata_port_map" = "0x7"
 			device pci 1c.4 on	# PCIe Port #5
-				smbios_slot_desc "SlotTypePciExpressGen3X16" "SlotLengthLong" "SLOT2" "SlotDataBusWidth4X"
+				smbios_slot_desc "SlotTypePciExpressGen2X16" "SlotLengthLong" "SLOT2" "SlotDataBusWidth4X"
 			end
 			device pci 1c.5 on  end	# PCIe Port #6
 			device pci 1c.6 on  end	# PCIe Port #7
diff --git a/src/mainboard/dell/snb_ivb_workstations/variants/precision_t1650/overridetree.cb b/src/mainboard/dell/snb_ivb_workstations/variants/precision_t1650/overridetree.cb
index 9452279..81133ee 100644
--- a/src/mainboard/dell/snb_ivb_workstations/variants/precision_t1650/overridetree.cb
+++ b/src/mainboard/dell/snb_ivb_workstations/variants/precision_t1650/overridetree.cb
@@ -5,10 +5,10 @@
 		chip southbridge/intel/bd82x6x # Intel Series 7 Panther Point PCH
 			register "sata_port_map" = "0xf"
 			device pci 1c.2 on	# PCIe Port #3
-				smbios_slot_desc "SlotTypePciExpressGen3X1" "SlotLengthShort" "SLOT2" "SlotDataBusWidth1X"
+				smbios_slot_desc "SlotTypePciExpressGen2X1" "SlotLengthShort" "SLOT2" "SlotDataBusWidth1X"
 			end
 			device pci 1c.4 on	# PCIe Port #5
-				smbios_slot_desc "SlotTypePciExpressGen3X16" "SlotLengthLong" "SLOT4" "SlotDataBusWidth4X"
+				smbios_slot_desc "SlotTypePciExpressGen2X16" "SlotLengthLong" "SLOT4" "SlotDataBusWidth4X"
 			end
 			device pci 1c.5 on  end	# PCIe Port #6
 			device pci 1c.6 on  end	# PCIe Port #7