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/include/linux/pci.h b/include/linux/pci.h
index 842adaa..0c3a294 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -210,6 +210,7 @@
 	PCI_SPEED_133MHz_PCIX_533	= 0x13,
 	PCIE_SPEED_2_5GT		= 0x14,
 	PCIE_SPEED_5_0GT		= 0x15,
+	PCIE_SPEED_8_0GT		= 0x16,
 	PCI_SPEED_UNKNOWN		= 0xff,
 };