staging: comedi: ni_stc.h: tidy up DAC_FIFO_Data register

Rename the CamelCase.
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_mio_common.c

@@ -1032,7 +1032,7 @@ static void ni_ao_fifo_load(struct comedi_device *dev,
 			}
 			ni_writel(dev, packed_data, DAC_FIFO_Data_611x);
 		} else {
-			ni_writew(dev, d, DAC_FIFO_Data);
+			ni_writew(dev, d, NI_E_AO_FIFO_DATA_REG);
 		}
 	}
 }

drivers/staging/comedi/drivers/ni_stc.h

@@ -642,7 +642,7 @@ static inline unsigned GPCT_DMA_Select_Mask(unsigned gpct_index)
 
 #define NI_E_AI_FIFO_DATA_REG		0x1c	/* r16 */
 
-#define DAC_FIFO_Data			0x1e
+#define NI_E_AO_FIFO_DATA_REG		0x1e	/* w16 */
 #define DAC0_Direct_Data		0x18
 #define DAC1_Direct_Data		0x1a