Bluetooth: Controller: Fix periodic sync Skip value vs Sync_Timeout
Bluetooth: Controller: Fix periodic sync Skip value vs Sync_Timeout

Adjust skip value so that there is minimum of 6 events that can be
listened to before Sync_Timeout occurs.

Signed-off-by: Vinayak Kariappa Chettimada <e780c9f87dc729ad454f47292ad82c8652353064@nordicsemi.no>

zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr