net: shell: Enhance IPv6 fragmentation debugging prints
net: shell: Enhance IPv6 fragmentation debugging prints

Print also network buffers that are allocated by the IPv6
fragment handler. This is very useful in debugging.

Signed-off-by: Jukka Rissanen <f9f077d1da4c7aa947f9864fa5a28c3588f6a45d@linux.intel.com>

bigdinotech/zephyr,bigdinotech/zephyr,bigdinotech/zephyr,bigdinotech/zephyr,bigdinotech/zephyr