staging: comedi: rtd520: remove RtdResetCGT macro

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

@@ -406,10 +406,6 @@ struct rtdPrivate {
 
 /* Macros to access registers */
 
-/* Reset channel gain table read pointer */
-#define RtdResetCGT(dev) \
-	writel(0, devpriv->las0+LAS0_CGT_RESET)
-
 /* Reset channel gain table read and write pointers */
 #define RtdClearCGT(dev) \
 	writel(0, devpriv->las0+LAS0_CGT_CLEAR)