[PATCH 2/5] iio: adc: stm32-dfsdm: 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
warnings with W=1:

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

Fix them.

Signed-off-by: Antonio Borneo <antonio.borneo@xxxxxxxxxxx>
---
 drivers/iio/adc/stm32-dfsdm-adc.c  | 1 +
 drivers/iio/adc/stm32-dfsdm-core.c | 1 +
 2 files changed, 2 insertions(+)

diff --git a/drivers/iio/adc/stm32-dfsdm-adc.c b/drivers/iio/adc/stm32-dfsdm-adc.c
index f583924eb16bb..c2d21eecafe79 100644
--- a/drivers/iio/adc/stm32-dfsdm-adc.c
+++ b/drivers/iio/adc/stm32-dfsdm-adc.c
@@ -8,6 +8,7 @@
 
 #include <linux/dmaengine.h>
 #include <linux/dma-mapping.h>
+#include <linux/export.h>
 #include <linux/iio/adc/stm32-dfsdm-adc.h>
 #include <linux/iio/backend.h>
 #include <linux/iio/buffer.h>
diff --git a/drivers/iio/adc/stm32-dfsdm-core.c b/drivers/iio/adc/stm32-dfsdm-core.c
index 041dc9ebc0482..47e2d1338e9e6 100644
--- a/drivers/iio/adc/stm32-dfsdm-core.c
+++ b/drivers/iio/adc/stm32-dfsdm-core.c
@@ -8,6 +8,7 @@
 
 #include <linux/bitfield.h>
 #include <linux/clk.h>
+#include <linux/export.h>
 #include <linux/iio/iio.h>
 #include <linux/iio/sysfs.h>
 #include <linux/interrupt.h>
-- 
2.34.1