net: ipv6: fix NBR lock initialization
net: ipv6: fix NBR lock initialization

The nbr_lock var actually depends on CONFIG_NET_IPV6_NBR_CACHE
(not CONFIG_NET_IPV6_ND), so move its initialization call.

Signed-off-by: Stancu Florin <e5dfb926a9a9171c7a03d6f2459fc06e34d51f0a@gmail.com>

zephyrproject-rtos/zephyr,galak/zephyr,finikorg/zephyr,galak/zephyr,galak/zephyr,finikorg/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,finikorg/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr