staging: comedi: das16: checkpatch.pl cleanup (missing blank line)

Fix thess checkpatch.pl warnings:

WARNING: Missing a blank line after declarations
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/das16.c

@@ -506,18 +506,18 @@ static void das16_ai_disable(struct comedi_device *dev)
 static int disable_dma_on_even(struct comedi_device *dev)
 {
 	struct das16_private_struct *devpriv = dev->private;
-	int residue;
-	int i;
 	static const int disable_limit = 100;
 	static const int enable_timeout = 100;
+	int residue;
+	int new_residue;
+	int i;
+	int j;
 
 	disable_dma(devpriv->dma_chan);
 	residue = get_dma_residue(devpriv->dma_chan);
 	for (i = 0; i < disable_limit && (residue % 2); ++i) {
-		int j;
 		enable_dma(devpriv->dma_chan);
 		for (j = 0; j < enable_timeout; ++j) {
-			int new_residue;
 			udelay(2);
 			new_residue = get_dma_residue(devpriv->dma_chan);
 			if (new_residue != residue)