netfilter: nf_tables: unininline nft_trace_packet()

It makes no sense to inline a rarely used function meant for debugging
only that is called a total of five times in the main evaluation loop.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

diff --cc net/netfilter/nf_tables_core.c
Simple merge