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

The "DMA Config" 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.c

@@ -413,7 +413,7 @@ void ni_tio_init_counter(struct ni_gpct *counter)
 							counter_index));
 	}
 	ni_tio_set_bits(counter,
-			NITIO_Gi_DMA_Config_Reg(counter->counter_index), ~0,
+			NITIO_DMA_CFG_REG(counter->counter_index), ~0,
 			0x0);
 	ni_tio_set_bits(counter,
 			NITIO_Gi_Interrupt_Enable_Reg(counter->counter_index),

drivers/staging/comedi/drivers/ni_tio_internal.h

@@ -34,21 +34,7 @@
 #define NITIO_RESET_REG(x)		(NITIO_G01_RESET + ((x) / 2))
 #define NITIO_STATUS1_REG(x)		(NITIO_G01_STATUS1 + ((x) / 2))
 #define NITIO_STATUS2_REG(x)		(NITIO_G01_STATUS2 + ((x) / 2))
-
-static inline enum ni_gpct_register NITIO_Gi_DMA_Config_Reg(unsigned idx)
-{
-	switch (idx) {
-	case 0:
-		return NITIO_G0_DMA_CFG;
-	case 1:
-		return NITIO_G1_DMA_CFG;
-	case 2:
-		return NITIO_G2_DMA_CFG;
-	case 3:
-		return NITIO_G3_DMA_CFG;
-	}
-	return 0;
-}
+#define NITIO_DMA_CFG_REG(x)		(NITIO_G0_DMA_CFG + (x))
 
 static inline enum ni_gpct_register NITIO_Gi_DMA_Status_Reg(unsigned idx)
 {

drivers/staging/comedi/drivers/ni_tiocmd.c

@@ -84,7 +84,7 @@ static void ni_tio_configure_dma(struct ni_gpct *counter, short enable,
 			if (read_not_write == 0)
 				gi_dma_config_bits |= Gi_DMA_Write_Bit;
 			ni_tio_set_bits(counter,
-					NITIO_Gi_DMA_Config_Reg(counter->
+					NITIO_DMA_CFG_REG(counter->
 								counter_index),
 					Gi_DMA_Enable_Bit | Gi_DMA_Int_Bit |
 					Gi_DMA_Write_Bit, gi_dma_config_bits);