iio: Remove timestamp argument from iio_trigger_poll() and iio_trigger_poll_chained()

argument has been ignored; adjust drivers accordingly

Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
diff --git a/drivers/iio/trigger/iio-trig-interrupt.c b/drivers/iio/trigger/iio-trig-interrupt.c
index 02577ec..7a149a7 100644
--- a/drivers/iio/trigger/iio-trig-interrupt.c
+++ b/drivers/iio/trigger/iio-trig-interrupt.c
@@ -24,8 +24,7 @@
 
 static irqreturn_t iio_interrupt_trigger_poll(int irq, void *private)
 {
-	/* Timestamp not currently provided */
-	iio_trigger_poll(private, 0);
+	iio_trigger_poll(private);
 	return IRQ_HANDLED;
 }