staging: comedi: addi_apci_3120: rename private data 'us_UseDma'

Rename this CamelCase member of the private data and convert it to
a bit-field.

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/addi-data/hwdrv_apci3120.c

@@ -293,7 +293,7 @@ static int apci3120_ai_cmd(struct comedi_device *dev,
 	apci3120_timer_set_mode(dev, 0, APCI3120_TIMER_MODE2);
 	apci3120_timer_write(dev, 0, divisor);
 
-	if (devpriv->us_UseDma) {
+	if (devpriv->use_dma) {
 		apci3120_setup_dma(dev, s);
 	} else {
 		devpriv->mode |= APCI3120_MODE_EOS_IRQ_ENA;

drivers/staging/comedi/drivers/addi_apci_3120.c

@@ -129,7 +129,7 @@ struct apci3120_private {
 	unsigned long amcc;
 	unsigned long addon;
 	unsigned int osc_base;
-	unsigned short us_UseDma;
+	unsigned int use_dma:1;
 	unsigned char b_DmaDoubleBuffer;
 	unsigned int ui_DmaActualBuffer;
 	struct apci3120_dmabuf dmabuf[2];
@@ -467,7 +467,7 @@ static void apci3120_dma_alloc(struct comedi_device *dev)
 		dmabuf->size = PAGE_SIZE << order;
 
 		if (i == 0)
-			devpriv->us_UseDma = 1;
+			devpriv->use_dma = 1;
 		if (i == 1)
 			devpriv->b_DmaDoubleBuffer = 1;
 	}