Merge branch 'tcp-remove-net-core-request_sock-c-and-no-longer-inline-__reqsk_free'

Eric Dumazet says:

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tcp: remove net/core/request_sock.c and no longer inline __reqsk_free()

After DCCP removal, net/core/request_sock.c makes no more sense.

Move reqsk_queue_alloc() and reqsk_fastopen_remove() to TCP files.

Then put __reqsk_free() out of line to save ~2 Kbytes of text.
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Link: https://patch.msgid.link/20260204055147.1682705-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>