staging: comedi: das16m1: remove 'volatile' from private data

As indicated by checkpatch.pl, "WARNING: Use of volatile is usually
wrong: ...". The variables in the private data that are marked
volatile don't need to be. Remove the volatile.
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/das16m1.c

@@ -126,7 +126,7 @@ static const struct comedi_lrange range_das16m1 = {
 
 struct das16m1_private_struct {
 	unsigned int control_state;
-	volatile unsigned int adc_count;	/*  number of samples completed */
+	unsigned int adc_count;	/*  number of samples completed */
 	/* initial value in lower half of hardware conversion counter,
 	 * needed to keep track of whether new count has been loaded into
 	 * counter yet (loaded by first sample conversion) */