usb: dwc3: debugfs: return strings that match tracepoints

In order to improve usability a tiny bit, we will return strings that
match what our tracepoints return.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

drivers/usb/dwc3/debugfs.c

@@ -650,13 +650,13 @@ static inline const char *dwc3_trb_type_string(struct dwc3_trb *trb)
 	case DWC3_TRBCTL_NORMAL:
 		return "normal";
 	case DWC3_TRBCTL_CONTROL_SETUP:
-		return "control-setup";
+		return "setup";
 	case DWC3_TRBCTL_CONTROL_STATUS2:
-		return "control-status2";
+		return "status2";
 	case DWC3_TRBCTL_CONTROL_STATUS3:
-		return "control-status3";
+		return "status3";
 	case DWC3_TRBCTL_CONTROL_DATA:
-		return "control-data";
+		return "data";
 	case DWC3_TRBCTL_ISOCHRONOUS_FIRST:
 		return "isoc-first";
 	case DWC3_TRBCTL_ISOCHRONOUS: