staging: comedi: ni_mio_common: move ni_stc_dma_channel_select_bitfield()

Move this inline helper function from ni_stc.h. It does not need to be
exposed outside of this file.
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

@@ -567,6 +567,17 @@ static inline void ni_set_bitfield(struct comedi_device *dev, int reg,
 
 #ifdef PCIDMA
 /* DMA channel setup */
+static inline unsigned ni_stc_dma_channel_select_bitfield(unsigned channel)
+{
+	if (channel < 4)
+		return 1 << channel;
+	if (channel == 4)
+		return 0x3;
+	if (channel == 5)
+		return 0x5;
+	BUG();
+	return 0;
+}
 
 /* negative channel means no channel */
 static inline void ni_set_ai_dma_channel(struct comedi_device *dev, int channel)

drivers/staging/comedi/drivers/ni_stc.h

@@ -592,18 +592,6 @@
 #define NI_E_MISC_CMD_EXT_ATRIG		NI_E_MISC_CMD_INTEXT_ATRIG(0)
 #define NI_E_MISC_CMD_INT_ATRIG		NI_E_MISC_CMD_INTEXT_ATRIG(1)
 
-static inline unsigned ni_stc_dma_channel_select_bitfield(unsigned channel)
-{
-	if (channel < 4)
-		return 1 << channel;
-	if (channel == 4)
-		return 0x3;
-	if (channel == 5)
-		return 0x5;
-	BUG();
-	return 0;
-}
-
 #define NI_E_AI_CFG_LO_REG		0x10	/* w16 */
 #define NI_E_AI_CFG_LO_LAST_CHAN	BIT(15)
 #define NI_E_AI_CFG_LO_GEN_TRIG		BIT(12)