staging: comedi: cb_pcidas: fix a space before tab issue

As reported by checkpatch.pl, spaces should not be used before
tabs.

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/cb_pcidas.c

@@ -1063,7 +1063,7 @@ static int cb_pcidas_ai_cmd(struct comedi_device *dev,
 	else if (cmd->start_src == TRIG_EXT) {
 		bits |= EXT_TRIGGER | TGEN | XTRCL;
 		if (thisboard->is_1602) {
-		    	if (cmd->start_arg & CR_INVERT)
+			if (cmd->start_arg & CR_INVERT)
 				bits |= TGPOL;
 			if (cmd->start_arg & CR_EDGE)
 				bits |= TGSEL;