USB: LTM also for USB 3.1

LTM is also defined for SS+. The correct test is to check for anything
slower than SS not exactly SS.

Signed-off-by: Oliver Neukum <ONeukum@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/include/linux/usb.h b/include/linux/usb.h
index 6a9a0c2..29aba760 100644
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -720,7 +720,7 @@
 
 static inline bool usb_device_supports_ltm(struct usb_device *udev)
 {
-	if (udev->speed != USB_SPEED_SUPER || !udev->bos || !udev->bos->ss_cap)
+	if (udev->speed < USB_SPEED_SUPER || !udev->bos || !udev->bos->ss_cap)
 		return false;
 	return udev->bos->ss_cap->bmAttributes & USB_LTM_SUPPORT;
 }