drivers: iio: imu: Add NULL check before using 'irq_get_irq_data'

Add NULL check to avoid potential NULL pointer dereference.

Change-Id: Id383ce6deb7139a32e77567afedbe854c2b5654f
Signed-off-by: Manohar Vavilapalli <mvavilap@codeaurora.org>
1 file changed