net/ieee802154: Shell handles extended address in EUI-64 format
net/ieee802154: Shell handles extended address in EUI-64 format

802.15.4, as other radio tech, works in little endian on network level.
To keeps things simple, the inner context per-interface, stores the
extended address that way. But it can be confusing in shell then, so
let's work handle these addreses through EUI-64 format there.

Fixes #4936

Signed-off-by: Tomasz Bursztyka <ba81a3a719836727e6857ae83462b9f52ec41006@linux.intel.com>

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