Bluetooth: Mesh: fix adv counter in LPN
Bluetooth: Mesh: fix adv counter in LPN

LPN should send Poll\Sub Add\Sub Del only once.
Sending multiple times breaks polling time parameters
(Figure 3.17: Friendship timing parameters).

Signed-off-by: Aleksandr Khromykh <cef6639e6ba1ae7ad5e7f21adf673d232995fb14@nordicsemi.no>

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