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

The "SW Save" 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

@@ -1648,15 +1648,14 @@ int ni_tio_rinsn(struct ni_gpct *counter, struct comedi_insn *insn,
 		   a third read will be correct since the count value will definitely have latched by then. */
 		first_read =
 		    read_register(counter,
-				  NITIO_Gi_SW_Save_Reg(counter->counter_index));
+				  NITIO_SW_SAVE_REG(counter->counter_index));
 		second_read =
 		    read_register(counter,
-				  NITIO_Gi_SW_Save_Reg(counter->counter_index));
+				  NITIO_SW_SAVE_REG(counter->counter_index));
 		if (first_read != second_read)
 			correct_read =
 			    read_register(counter,
-					  NITIO_Gi_SW_Save_Reg(counter->
-							       counter_index));
+				  NITIO_SW_SAVE_REG(counter->counter_index));
 		else
 			correct_read = first_read;
 		data[0] = correct_read;

drivers/staging/comedi/drivers/ni_tio_internal.h

@@ -23,6 +23,7 @@
 
 #define NITIO_AUTO_INC_REG(x)		(NITIO_G0_AUTO_INC + (x))
 #define NITIO_CMD_REG(x)		(NITIO_G0_CMD + (x))
+#define NITIO_SW_SAVE_REG(x)		(NITIO_G0_SW_SAVE + (x))
 
 static inline enum ni_gpct_register NITIO_Gi_Counting_Mode_Reg(unsigned idx)
 {
@@ -151,21 +152,6 @@ static inline enum ni_gpct_register NITIO_Gi_Mode_Reg(unsigned idx)
 	return 0;
 }
 
-static inline enum ni_gpct_register NITIO_Gi_SW_Save_Reg(int idx)
-{
-	switch (idx) {
-	case 0:
-		return NITIO_G0_SW_SAVE;
-	case 1:
-		return NITIO_G1_SW_SAVE;
-	case 2:
-		return NITIO_G2_SW_SAVE;
-	case 3:
-		return NITIO_G3_SW_SAVE;
-	}
-	return 0;
-}
-
 static inline enum ni_gpct_register NITIO_Gi_Second_Gate_Reg(unsigned idx)
 {
 	switch (idx) {