net: bt: Fix failing to resolve link-local address
net: bt: Fix failing to resolve link-local address

This make sure the link-local address of the destination is added to the
nbr cache as that is accessed when calling net_ipv6_prepare_for_send,
this is needed when following RFC 7668 since link-local addresses are
never registered using nbr discovery.

Change-Id: I2bc578d33d1061726d0cbf46e4464df74d79e992
Signed-off-by: Luiz Augusto von Dentz <8530c5ea66a1bdbc08f98bfcf183c8be901b5990@intel.com>

tidyjiang8/zephyr-doc,aceofall/zephyr-iotos,pklazy/zephyr,finikorg/zephyr,galak/zephyr,rsalveti/zephyr,holtmann/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,holtmann/zephyr,pklazy/zephyr,zephyriot/zephyr,nashif/zephyr,mbolivar/zephyr,explora26/zephyr,GiulianoFranchetto/zephyr,GiulianoFranchetto/zephyr,sharronliu/zephyr,fractalclone/zephyr-riscv,bigdinotech/zephyr,punitvara/zephyr,galak/zephyr,bigdinotech/zephyr,rsalveti/zephyr,sharronliu/zephyr,ldts/zephyr,ldts/zephyr,erwango/zephyr,tidyjiang8/zephyr-doc,galak/zephyr,fbsder/zephyr,ldts/zephyr,fbsder/zephyr,runchip/zephyr-cc3200,zephyriot/zephyr,fbsder/zephyr,galak/zephyr,explora26/zephyr,bboozzoo/zephyr,kraj/zephyr,finikorg/zephyr,runchip/zephyr-cc3220,pklazy/zephyr,zephyrproject-rtos/zephyr,erwango/zephyr,bigdinotech/zephyr,ldts/zephyr,bigdinotech/zephyr,bigdinotech/zephyr,rsalveti/zephyr,mbolivar/zephyr,nashif/zephyr,runchip/zephyr-cc3220,zephyriot/zephyr,finikorg/zephyr,mbolivar/zephyr,nashif/zephyr,holtmann/zephyr,fractalclone/zephyr-riscv,zephyrproject-rtos/zephyr,fractalclone/zephyr-riscv,zephyriot/zephyr,aceofall/zephyr-iotos,mbolivar/zephyr,bboozzoo/zephyr,fbsder/zephyr,Vudentz/zephyr,Vudentz/zephyr,ldts/zephyr,erwango/zephyr,mbolivar/zephyr,bboozzoo/zephyr,Vudentz/zephyr,sharronliu/zephyr,nashif/zephyr,explora26/zephyr,tidyjiang8/zephyr-doc,zephyrproject-rtos/zephyr,kraj/zephyr,sharronliu/zephyr,rsalveti/zephyr,Vudentz/zephyr,pklazy/zephyr,explora26/zephyr,GiulianoFranchetto/zephyr,fractalclone/zephyr-riscv,Vudentz/zephyr,finikorg/zephyr,bboozzoo/zephyr,zephyrproject-rtos/zephyr,explora26/zephyr,fbsder/zephyr,finikorg/zephyr,GiulianoFranchetto/zephyr,pklazy/zephyr,holtmann/zephyr,runchip/zephyr-cc3200,aceofall/zephyr-iotos,Vudentz/zephyr,runchip/zephyr-cc3220,runchip/zephyr-cc3200,GiulianoFranchetto/zephyr,runchip/zephyr-cc3220,erwango/zephyr,rsalveti/zephyr,runchip/zephyr-cc3200,runchip/zephyr-cc3220,kraj/zephyr,punitvara/zephyr,fractalclone/zephyr-riscv,punitvara/zephyr,bboozzoo/zephyr,holtmann/zephyr,tidyjiang8/zephyr-doc,runchip/zephyr-cc3200,aceofall/zephyr-iotos,kraj/zephyr,tidyjiang8/zephyr-doc,erwango/zephyr,punitvara/zephyr,punitvara/zephyr,sharronliu/zephyr,aceofall/zephyr-iotos,zephyriot/zephyr,nashif/zephyr,kraj/zephyr