UPSTREAM: wireguard: ratelimiter: use kvcalloc() instead of kvzalloc()

Use 2-factor argument form kvcalloc() instead of kvzalloc().

Bug: 254441685
Link: https://github.com/KSPP/linux/issues/162


Fixes: e7096c131e51 ("net: WireGuard secure network tunnel")
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
[Jason: Gustavo's link above is for KSPP, but this isn't actually a
 security fix, as table_size is bounded to 8192 anyway, and gcc realizes
 this, so the codegen comes out to be about the same.]
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
(cherry picked from commit 4e3fd721710553832460c179c2ee5ce67ef7f1e0)
Signed-off-by: Lee Jones <joneslee@google.com>
Change-Id: I40ffcc5abc3ea3032e889ab08cc2b940bf701e35