wireguard: kconfig: use arm chacha even with no neon

stable inclusion
from stable-5.10.20
commit d0b3159fca6e97621fbf4e0f40f55d6f44781b48
bugzilla: 50608

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

[ Upstream commit bce24739 ]

The condition here was incorrect: a non-neon fallback implementation is
available on arm32 when NEON is not supported.

Reported-by: Ilya Lipnitskiy <ilya.lipnitskiy@gmail.com>
Fixes: e7096c13 ("net: WireGuard secure network tunnel")
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Chen Jun <chenjun102@huawei.com>
Acked-by: Xie XiuQi <xiexiuqi@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>