net: Switch usage of net_pkt_get_reserve to net_pkt_alloc

Some places were still using the old allocator. Using the new one does
not change any behavior. This will help to remove the useless data_len
attribute in net_pkt which legacy allocator was still setting.

Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
6 files changed