Merge branch 'net-use-ip_outnoroutes-drop-reason'

Eric Dumazet says:

====================
net: use IP_OUTNOROUTES drop reason

First patch changes sk_skb_reason_drop() sock to be const.

Second and last patch add SKB_DROP_REASON_IP_OUTNOROUTES
to both tcp_v6_send_response() and inet6_csk_xmit().
====================

Link: https://patch.msgid.link/20260511072310.1094859-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>