hwmon: (ds620) move header file out of I2C realm

include/linux/i2c is not for client devices. Move the header file to a
more appropriate location.

Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
diff --git a/drivers/hwmon/ds620.c b/drivers/hwmon/ds620.c
index 0043a4c..57d6958 100644
--- a/drivers/hwmon/ds620.c
+++ b/drivers/hwmon/ds620.c
@@ -30,7 +30,7 @@
 #include <linux/err.h>
 #include <linux/mutex.h>
 #include <linux/sysfs.h>
-#include <linux/i2c/ds620.h>
+#include <linux/platform_data/ds620.h>
 
 /*
  * Many DS620 constants specified below