usb: core: Add USB_QUIRK_DELAY_CTRL_MSG to usbcore quirks

There's a new quirk, USB_QUIRK_DELAY_CTRL_MSG. Add it to usbcore quirks
for completeness.

Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/usb/core/quirks.c b/drivers/usb/core/quirks.c
index 29e5f32..920f48a 100644
--- a/drivers/usb/core/quirks.c
+++ b/drivers/usb/core/quirks.c
@@ -124,6 +124,9 @@
 			case 'm':
 				flags |= USB_QUIRK_DISCONNECT_SUSPEND;
 				break;
+			case 'n':
+				flags |= USB_QUIRK_DELAY_CTRL_MSG;
+				break;
 			/* Ignore unrecognized flag characters */
 			}
 		}