staging: comedi: comedi_test: use CMDF_PRIORITY

Replace use of `TRIG_RT` command flag with the equivalent flag
`CMDF_PRIORITY`.  The numeric value is unchanged.
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Reviewed-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/drivers/comedi_test.c

@@ -302,7 +302,7 @@ static int waveform_ai_cmd(struct comedi_device *dev,
 	struct waveform_private *devpriv = dev->private;
 	struct comedi_cmd *cmd = &s->async->cmd;
 
-	if (cmd->flags & TRIG_RT) {
+	if (cmd->flags & CMDF_PRIORITY) {
 		dev_err(dev->class_dev,
 			"commands at RT priority not supported in this driver\n");
 		return -1;