nfp: flower: add ipv6 bit to pre_tunnel control message

stable inclusion
from stable-5.10.27
commit 47dae14b21f7da4cf9ea3359aa4b4c75bf55636a
bugzilla: 51493

--------------------------------

[ Upstream commit 5c4f5e19 ]

Differentiate between ipv4 and ipv6 flows when configuring the pre_tunnel
table to prevent them trampling each other in the table.

Fixes: 78346160 ("nfp: flower: update flow merge code to support IPv6 tunnels")
Signed-off-by: Louis Peens <louis.peens@corigine.com>
Signed-off-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Chen Jun <chenjun102@huawei.com>
Acked-by:   Weilong Chen <chenweilong@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>