iio:imu: Add support for the ADIS16480 and similar IMUs

This patch adds support for the ADIS16375, ADIS16480, ADIS16485, ADIS16488 6
degree to 10 degree of freedom IMUs.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
diff --git a/drivers/iio/imu/adis.c b/drivers/iio/imu/adis.c
index c4ea04f..911255d 100644
--- a/drivers/iio/imu/adis.c
+++ b/drivers/iio/imu/adis.c
@@ -238,6 +238,9 @@
 	int ret = 0;
 	uint16_t msc;
 
+	if (adis->data->enable_irq)
+		return adis->data->enable_irq(adis, enable);
+
 	ret = adis_read_reg_16(adis, adis->data->msc_ctrl_reg, &msc);
 	if (ret)
 		goto error_ret;