Sort the header inclusions alphabetically. This improves readability and
simplifies adding new includes in the future.

Group subsystem-specific headers (linux/iio/*) separately at the end
to clarify subsystem context.

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
---
changes v4:
- no changes
changes v3:
- Keep linux/iio/* headers in a separate group at the end of the includes.
changes v2:
- new patch
---
 drivers/iio/dac/ds4424.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/iio/dac/ds4424.c b/drivers/iio/dac/ds4424.c
index 36286e4923af..c03051dc763e 100644
--- a/drivers/iio/dac/ds4424.c
+++ b/drivers/iio/dac/ds4424.c
@@ -6,16 +6,17 @@
  */
 
 #include <linux/bits.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/i2c.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
-#include <linux/i2c.h>
 #include <linux/regulator/consumer.h>
-#include <linux/err.h>
-#include <linux/delay.h>
-#include <linux/iio/iio.h>
+
+#include <linux/iio/consumer.h>
 #include <linux/iio/driver.h>
+#include <linux/iio/iio.h>
 #include <linux/iio/machine.h>
-#include <linux/iio/consumer.h>
 
 #define DS4422_MAX_DAC_CHANNELS		2
 #define DS4424_MAX_DAC_CHANNELS		4
-- 
2.47.3