staging:iio: Use userspace types for iio_event_data

Since we want to export struct iio_event_data to userspace use the userspace
integer types. Also add a include to linux/types.h.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/iio/events.h

@@ -10,6 +10,7 @@
 #define _IIO_EVENTS_H_
 
 #include <linux/ioctl.h>
+#include <linux/types.h>
 #include "types.h"
 
 /**
@@ -19,8 +20,8 @@
  *		the interrupt handler)
  */
 struct iio_event_data {
-	u64	id;
-	s64	timestamp;
+	__u64	id;
+	__s64	timestamp;
 };
 
 #define IIO_GET_EVENT_FD_IOCTL _IOR('i', 0x90, int)