netfilter: remove redundant casts from Ebtables

Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
Signed-off-by: Patrick McHardy <kaber@trash.net>

diff --cc net/bridge/netfilter/ebt_arpreply.c
Simple merge

diff --cc net/bridge/netfilter/ebt_ip6.c
Simple merge

diff --cc net/bridge/netfilter/ebt_limit.c
Simple merge

diff --cc net/bridge/netfilter/ebt_nflog.c
Simple merge