PCI: Add support for reporting PCIe 3.0 speeds

Add the 8.0 GT/s speed.

Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 2803ab9..9672760 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -416,7 +416,7 @@
 	PCI_SPEED_UNKNOWN,		/* 0 */
 	PCIE_SPEED_2_5GT,		/* 1 */
 	PCIE_SPEED_5_0GT,		/* 2 */
-	PCI_SPEED_UNKNOWN,		/* 3 */
+	PCIE_SPEED_8_0GT,		/* 3 */
 	PCI_SPEED_UNKNOWN,		/* 4 */
 	PCI_SPEED_UNKNOWN,		/* 5 */
 	PCI_SPEED_UNKNOWN,		/* 6 */