radio: iris: Fix stereo display issue

There was a bug where the kernel driver was not sending the
audio mode event.This patch adds the support to send the events
to the upper layer.

Change-Id: I08326f5de2796bf40ec25b5646bd21be4aa94b88
CRs-Fixed: 312918
Signed-off-by: Srinivasa Rao Uppala <uppalas@codeaurora.org>
diff --git a/drivers/media/radio/radio-iris.c b/drivers/media/radio/radio-iris.c
index 2d42e17..e4430ad 100644
--- a/drivers/media/radio/radio-iris.c
+++ b/drivers/media/radio/radio-iris.c
@@ -2676,6 +2676,14 @@
 				FMDERR("Failed to set stereo mode\n");
 				return retval;
 			}
+			radio->event_mask = SIG_LEVEL_INTR |
+						RDS_SYNC_INTR | AUDIO_CTRL_INTR;
+			retval = hci_conf_event_mask(&radio->event_mask,
+							radio->fm_hdev);
+			if (retval < 0) {
+				FMDERR("Enable Async events failed");
+				return retval;
+			}
 			retval = hci_cmd(HCI_FM_GET_RECV_CONF_CMD,
 						radio->fm_hdev);
 			if (retval < 0)