media: adv7604 added include of linux/interrupt.h

On older Kernels (prior to 4.15) irqreturn_t and devm_request_threaded_irq
is not defined when compiling adv7604.c. It seems more recent Kernels
include it via another header which is included by adv7604.c.
Now we include linux/interrupt.h explicitly to get the type also defined
for Kernels prior to 4.15.
Signed-off-by: Jasmin Jessich <jasmin@anw.at>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/media/i2c/adv7604.c

@@ -27,6 +27,7 @@
 #include <linux/videodev2.h>
 #include <linux/workqueue.h>
 #include <linux/regmap.h>
+#include <linux/interrupt.h>
 
 #include <media/i2c/adv7604.h>
 #include <media/cec.h>