usb: gadget: aspeed: Implement dummy hub TT requests

We just accept them instead of stalling and return
zeros on GetTTState.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

drivers/usb/gadget/udc/aspeed-vhub/hub.c

@@ -730,6 +730,12 @@ enum std_req_rc ast_vhub_class_hub_request(struct ast_vhub_ep *ep,
 	case ClearPortFeature:
 		EPDBG(ep, "ClearPortFeature(%d,%d)\n", wIndex & 0xf, wValue);
 		return ast_vhub_clr_port_feature(ep, wIndex & 0xf, wValue);
+	case ClearTTBuffer:
+	case ResetTT:
+	case StopTT:
+		return std_req_complete;
+	case GetTTState:
+		return ast_vhub_simple_reply(ep, 0, 0, 0, 0);
 	default:
 		EPDBG(ep, "Unknown class request\n");
 	}