staging: comedi: pcl816: trigger sources were validated in (*do_cmdtest)

The trigger sources were already validataed in the (*do_cmdtest) before the
(*do_cmd) is called. Remove the unnecessary checks in pcl816_ai_cmd().

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/drivers/pcl816.c

@@ -480,15 +480,6 @@ static int pcl816_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
 	struct comedi_cmd *cmd = &s->async->cmd;
 	unsigned int seglen;
 
-	if (cmd->start_src != TRIG_NOW)
-		return -EINVAL;
-	if (cmd->scan_begin_src != TRIG_FOLLOW)
-		return -EINVAL;
-	if (cmd->scan_end_src != TRIG_COUNT)
-		return -EINVAL;
-	if (cmd->scan_end_arg != cmd->chanlist_len)
-		return -EINVAL;
-/* if(cmd->chanlist_len>MAX_CHANLIST_LEN) return -EINVAL; */
 	if (devpriv->irq_blocked)
 		return -EBUSY;