staging: comedi: ni_labpc: remove unnecessary 'bustype' check

Only the ISA versions of the LabPC boards support DMA and the
devpriv->dma_chan is only set during the ISA board attach if
DMA is available. The extra check of the board->bustype is not
necessary in labpc_ai_cmd().
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/drivers/ni_labpc.c

@@ -893,9 +893,7 @@ static int labpc_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
 		 * dma unsafe at RT priority,
 		 * and too much setup time for TRIG_WAKE_EOS for
 		 */
-	    (cmd->flags & (TRIG_WAKE_EOS | TRIG_RT)) == 0 &&
-	    /*  only available on the isa boards */
-	    board->bustype == isa_bustype) {
+	    (cmd->flags & (TRIG_WAKE_EOS | TRIG_RT)) == 0) {
 		xfer = isa_dma_transfer;
 		/* pc-plus has no fifo-half full interrupt */
 	} else