Due to adding subgroup count and streams per subgroup
arguments to the broadcast_source test, fix the sink
test that was not ported due to being merged for change
in a different PR.
Relates to commit 01e8d0e3e0 ("tests: Bluetooth: BAP:
Add subgroup and stream args to broadcast_source").
Fixes commit 303d0b786f ("tests: Bluetooth: BAP: Add
test to test invalid bcode").
Signed-off-by: Vinayak Kariappa Chettimada <vich@nordicsemi.no>