Bluetooth: host: Fix uninitialized periodic interval parameter

Fix missing initialization of periodic interval value in
advertising report info structure.

Signed-off-by: Vinayak Kariappa Chettimada <vich@nordicsemi.no>
diff --git a/subsys/bluetooth/host/hci_core.c b/subsys/bluetooth/host/hci_core.c
index 9838528..e9bebf1 100644
--- a/subsys/bluetooth/host/hci_core.c
+++ b/subsys/bluetooth/host/hci_core.c
@@ -4759,11 +4759,12 @@
 
 		evt = net_buf_pull_mem(buf, sizeof(*evt));
 
-		adv_info.rssi = evt->data[evt->length];
 		adv_info.primary_phy = BT_GAP_LE_PHY_1M;
 		adv_info.secondary_phy = 0;
 		adv_info.tx_power = BT_GAP_TX_POWER_INVALID;
+		adv_info.rssi = evt->data[evt->length];
 		adv_info.sid = BT_GAP_SID_INVALID;
+		adv_info.interval = 0U;
 
 		adv_info.adv_type = evt->evt_type;
 		adv_info.adv_props = get_adv_props(evt->evt_type);