net: atlantic: macsec: clear encryption keys from the stack

net: atlantic: macsec: clear encryption keys from the stack

Commit a87ec6f757f4 ("macsec: clear encryption keys from the stack after
setting up offload") made sure to clean encryption keys from the stack
after setting up offloading, but the atlantic driver made a copy and did
not clear it. Fix this.

[4 Fixes tags below, all part of the same series, no need to split this]

Fixes: b0b9b89d8c45 ("net: atlantic: MACSec ingress offload implementation")
Fixes: e7895edacd9e ("net: atlantic: MACSec ingress offload HW bindings")
Fixes: 41790159870a ("net: atlantic: MACSec egress offload implementation")
Fixes: ba4608817052 ("net: atlantic: MACSec egress offload HW bindings")
Signed-off-by: Antoine Tenart <atenart@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>