usb: store the new usb 3.1 SuperSpeedPlus device capability descriptor

If a device supports usb 3.1 SupeerSpeedPlus Gen2 speeds it povides
a SuperSpeedPlus device capability descriptor as a part of its
BOS descriptor. If we find one while parsing the BOS then save it
togeter with the other device capabilities found in the BOS
Signed-off-by: NMathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/core/config.c

@@ -853,6 +853,10 @@ int usb_get_bos_descriptor(struct usb_device *dev)
 			dev->bos->ss_cap =
 				(struct usb_ss_cap_descriptor *)buffer;
 			break;
+		case USB_SSP_CAP_TYPE:
+			dev->bos->ssp_cap =
+				(struct usb_ssp_cap_descriptor *)buffer;
+			break;
 		case CONTAINER_ID_TYPE:
 			dev->bos->ss_id =
 				(struct usb_ss_container_id_descriptor *)buffer;

include/linux/usb.h

@@ -328,6 +328,7 @@ struct usb_host_bos {
 	/* wireless cap descriptor is handled by wusb */
 	struct usb_ext_cap_descriptor	*ext_cap;
 	struct usb_ss_cap_descriptor	*ss_cap;
+	struct usb_ssp_cap_descriptor	*ssp_cap;
 	struct usb_ss_container_id_descriptor	*ss_id;
 };