staging: comedi: usbduxsigma: remove a space before tab

checkpatch.pl reports:

WARNING: please, no space before tabs
+^Ihigh_speed = 0; ^I/* (devpriv->high_speed) */$

Remove the space to avoid the warning.
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/usbduxsigma.c

@@ -898,7 +898,7 @@ static int usbduxsigma_ao_cmdtest(struct comedi_device *dev,
 	unsigned int flags;
 
 	/* high speed conversions are not used yet */
-	high_speed = 0; 	/* (devpriv->high_speed) */
+	high_speed = 0;		/* (devpriv->high_speed) */
 
 	/* Step 1 : check if triggers are trivially valid */