UPSTREAM: wireguard: kconfig: use arm chacha even with no neon

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>
(cherry picked from commit bce24739)
Bug: 187129171
Signed-off-by: Connor O'Brien <connoro@google.com>
Change-Id: I51488925bddc575c48b56f17d02a7037a4d3c5c2