Bluetooth: Controller: Fix sync_delay and latency in LE BIG Complete

Fix missing sync_delay and transport_latency information in HCI
LE BIG Complete event.

Relates to commit 1a640e47 ("Bluetooth: controller:
Included transport latency in LE_Big_Established").

Signed-off-by: Vinayak Kariappa Chettimada <vich@nordicsemi.no>