staging: comedi: ni_tio_internal.h: replace NITIO_Gi_DMA_Status_Reg()

The "DMA Status" registers are sequential in the enum ni_gpct_register.
Replace this inline CamelCase function with a simple define.
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_tio_internal.h

@@ -35,21 +35,7 @@
 #define NITIO_STATUS1_REG(x)		(NITIO_G01_STATUS1 + ((x) / 2))
 #define NITIO_STATUS2_REG(x)		(NITIO_G01_STATUS2 + ((x) / 2))
 #define NITIO_DMA_CFG_REG(x)		(NITIO_G0_DMA_CFG + (x))
-
-static inline enum ni_gpct_register NITIO_Gi_DMA_Status_Reg(unsigned idx)
-{
-	switch (idx) {
-	case 0:
-		return NITIO_G0_DMA_STATUS;
-	case 1:
-		return NITIO_G1_DMA_STATUS;
-	case 2:
-		return NITIO_G2_DMA_STATUS;
-	case 3:
-		return NITIO_G3_DMA_STATUS;
-	}
-	return 0;
-}
+#define NITIO_DMA_STATUS_REG(x)		(NITIO_G0_DMA_STATUS + (x))
 
 static inline enum ni_gpct_register NITIO_Gi_ABZ_Reg(unsigned idx)
 {

drivers/staging/comedi/drivers/ni_tiocmd.c

@@ -443,7 +443,7 @@ void ni_tio_handle_interrupt(struct ni_gpct *counter,
 	case ni_gpct_variant_m_series:
 	case ni_gpct_variant_660x:
 		if (read_register(counter,
-				NITIO_Gi_DMA_Status_Reg
+				NITIO_DMA_STATUS_REG
 				(counter->counter_index)) & Gi_DRQ_Error_Bit) {
 			dev_notice(counter->counter_dev->dev->class_dev,
 				   "%s: Gi_DRQ_Error detected.\n", __func__);