staging: comedi: rtd520: remove RtdDma1Status macro

This macro uses the 'devpriv' macro which relies on a local variable
having a specific name. It's also not used. Remove the macro.
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/rtd520.c

@@ -404,12 +404,6 @@ struct rtdPrivate {
  */
 #define devpriv ((struct rtdPrivate *)dev->private)
 
-/* Macros to access registers */
-
-/* Get status for DMA 1 */
-#define RtdDma1Status(dev) \
-	readb(devpriv->lcfg+LCFG_DMACSR1)
-
 /*
   Given a desired period and the clock period (both in ns),
   return the proper counter value (divider-1).