greybus: interface: fix broken UniPro flow control

A recent commit inadvertently disabled E2EFC on all interface
connections, due to a failure to clear the ES3 bootrom quirk flags
during mode switch.

Testing Done: Verified that the CPort flags are again set to 0x7 for
non-bootrom interface connections.

Fixes: 5b638080e94e ("svc: keep interfaces registered during
mode switch")
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

drivers/staging/greybus/interface.c

@@ -226,6 +226,9 @@ static int gb_interface_read_and_clear_init_status(struct gb_interface *intf)
 		intf->quirks |= GB_INTERFACE_QUIRK_NO_CPORT_FEATURES;
 		intf->quirks |= GB_INTERFACE_QUIRK_NO_INTERFACE_VERSION;
 		break;
+	default:
+		intf->quirks &= ~GB_INTERFACE_QUIRK_NO_CPORT_FEATURES;
+		intf->quirks &= ~GB_INTERFACE_QUIRK_NO_INTERFACE_VERSION;
 	}
 
 	/* Clear the init status. */