staging:iio:dac: Remove unused dac.h includes

None of these drivers use anything from dac.h, so remove the include.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/iio/dac/ad5064.c

@@ -18,7 +18,6 @@
 
 #include <linux/iio/iio.h>
 #include <linux/iio/sysfs.h>
-#include "dac.h"
 
 #define AD5064_MAX_DAC_CHANNELS			8
 #define AD5064_MAX_VREFS			4

drivers/staging/iio/dac/ad5360.c

@@ -18,7 +18,6 @@
 
 #include <linux/iio/iio.h>
 #include <linux/iio/sysfs.h>
-#include "dac.h"
 
 #define AD5360_CMD(x)				((x) << 22)
 #define AD5360_ADDR(x)				((x) << 16)

drivers/staging/iio/dac/ad5380.c

@@ -20,8 +20,6 @@
 
 #include <linux/iio/iio.h>
 #include <linux/iio/sysfs.h>
-#include "dac.h"
-
 
 #define AD5380_REG_DATA(x)	(((x) << 2) | 3)
 #define AD5380_REG_OFFSET(x)	(((x) << 2) | 2)

drivers/staging/iio/dac/ad5421.c

@@ -19,7 +19,6 @@
 #include <linux/iio/iio.h>
 #include <linux/iio/sysfs.h>
 #include <linux/iio/events.h>
-#include "dac.h"
 #include "ad5421.h"
 
 

drivers/staging/iio/dac/ad5446.c

@@ -20,7 +20,6 @@
 
 #include <linux/iio/iio.h>
 #include <linux/iio/sysfs.h>
-#include "dac.h"
 
 #include "ad5446.h"
 

drivers/staging/iio/dac/ad5504.c

@@ -19,7 +19,7 @@
 #include <linux/iio/iio.h>
 #include <linux/iio/sysfs.h>
 #include <linux/iio/events.h>
-#include "dac.h"
+
 #include "ad5504.h"
 
 static int ad5504_spi_write(struct spi_device *spi, u8 addr, u16 val)

drivers/staging/iio/dac/ad5624r_spi.c

@@ -18,7 +18,7 @@
 
 #include <linux/iio/iio.h>
 #include <linux/iio/sysfs.h>
-#include "dac.h"
+
 #include "ad5624r.h"
 
 static int ad5624r_spi_write(struct spi_device *spi,

drivers/staging/iio/dac/ad5686.c

@@ -18,7 +18,6 @@
 
 #include <linux/iio/iio.h>
 #include <linux/iio/sysfs.h>
-#include "dac.h"
 
 #define AD5686_DAC_CHANNELS			4
 

drivers/staging/iio/dac/ad5764.c

@@ -18,7 +18,6 @@
 
 #include <linux/iio/iio.h>
 #include <linux/iio/sysfs.h>
-#include "dac.h"
 
 #define AD5764_REG_SF_NOP			0x0
 #define AD5764_REG_SF_CONFIG			0x1

drivers/staging/iio/dac/ad5791.c

@@ -19,7 +19,7 @@
 
 #include <linux/iio/iio.h>
 #include <linux/iio/sysfs.h>
-#include "dac.h"
+
 #include "ad5791.h"
 
 static int ad5791_spi_write(struct spi_device *spi, u8 addr, u32 val)