USB: add speed values for USB 3.0 and wireless controllers

These controllers say "unknown" for their speed in sysfs, which
obviously isn't correct.

Reported-by: Kurt Garloff <garloff@novell.com>
Cc: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Cc: David Vrabel <david.vrabel@csr.com>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/core/sysfs.c b/drivers/usb/core/sysfs.c
index 485edf9..5f3908f 100644
--- a/drivers/usb/core/sysfs.c
+++ b/drivers/usb/core/sysfs.c
@@ -115,6 +115,12 @@
 	case USB_SPEED_HIGH:
 		speed = "480";
 		break;
+	case USB_SPEED_VARIABLE:
+		speed = "480";
+		break;
+	case USB_SPEED_SUPER:
+		speed = "5000";
+		break;
 	default:
 		speed = "unknown";
 	}