net: do not delay zero-copy skbs in skb_attempt_defer_free()

net: do not delay zero-copy skbs in skb_attempt_defer_free()

After the blamed commit, TCP tx zero copy notifications could be
arbitrarily delayed and cause regressions in applications waiting
for them.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Fixes: e20dfbad8aab ("net: fix napi_consume_skb() with alien skbs")
Reviewed-by: Jason Xing <kerneljasonxing@gmail.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Link: https://patch.msgid.link/20260216193653.627617-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>