[PATCH 3/5] iio: trigger: stm32-timer: Fix build warnings about export.h

[Antonio Borneo]

After commit a934a57a42f6 ("scripts/misc-check: check missing #include
<linux/export.h> when W=1") and commit 7d95680d64ac ("scripts/misc-check:
check unnecessary #include <linux/export.h> when W=1") we get the build
warning with W=1:

drivers/iio/trigger/stm32-timer-trigger.c: warning: EXPORT_SYMBOL() is used, but #include <linux/export.h> is missing

Fix it.

Signed-off-by: Antonio Borneo <antonio.borneo at foss.st.com>
---
 drivers/iio/trigger/stm32-timer-trigger.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/iio/trigger/stm32-timer-trigger.c b/drivers/iio/trigger/stm32-timer-trigger.c
index 925b864facca1..3b9a3a6cbb25c 100644
--- a/drivers/iio/trigger/stm32-timer-trigger.c
+++ b/drivers/iio/trigger/stm32-timer-trigger.c
@@ -6,6 +6,7 @@
  *
  */
 
+#include <linux/export.h>
 #include <linux/iio/iio.h>
 #include <linux/iio/sysfs.h>
 #include <linux/iio/timer/stm32-timer-trigger.h>
-- 
2.34.1