net: Add IPv6 route add and delete event with info
net: Add IPv6 route add and delete event with info

If CONFIG_NET_MGMT_EVENT_INFO is enabled then provide mgmt info
about the route, which is added or deleted.

Signed-off-by: Ravi kumar Veeramally <406c082aeb452858c41b213a757768e1c1dff29e@linux.intel.com>

galak/zephyr,Vudentz/zephyr,explora26/zephyr,ldts/zephyr,ldts/zephyr,punitvara/zephyr,Vudentz/zephyr,zephyrproject-rtos/zephyr,zephyriot/zephyr,nashif/zephyr,ldts/zephyr,explora26/zephyr,nashif/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,Vudentz/zephyr,nashif/zephyr,Vudentz/zephyr,punitvara/zephyr,mbolivar/zephyr,galak/zephyr,GiulianoFranchetto/zephyr,GiulianoFranchetto/zephyr,Vudentz/zephyr,kraj/zephyr,galak/zephyr,mbolivar/zephyr,Vudentz/zephyr,GiulianoFranchetto/zephyr,zephyrproject-rtos/zephyr,nashif/zephyr,kraj/zephyr,zephyriot/zephyr,finikorg/zephyr,finikorg/zephyr,ldts/zephyr,explora26/zephyr,zephyriot/zephyr,GiulianoFranchetto/zephyr,galak/zephyr,punitvara/zephyr,nashif/zephyr,mbolivar/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,mbolivar/zephyr,punitvara/zephyr,kraj/zephyr,punitvara/zephyr,zephyriot/zephyr,mbolivar/zephyr,zephyriot/zephyr,finikorg/zephyr,explora26/zephyr,kraj/zephyr,ldts/zephyr,GiulianoFranchetto/zephyr,zephyrproject-rtos/zephyr,kraj/zephyr,galak/zephyr,explora26/zephyr