net: tcp_lp: fix kernel-doc warnings and update outdated reference links

net: tcp_lp: fix kernel-doc warnings and update outdated reference links

Fix kernel-doc warnings in tcp_lp.c by adding missing parameter
descriptions for tcp_lp_cong_avoid() and tcp_lp_pkts_acked() when
building with W=1.

Also replace invalid URLs in the file header comment with the currently
valid links to the TCP-LP paper and implementation page.

No functional changes.

Signed-off-by: Rakuram Eswaran <rakuram.e96@gmail.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20251025-net_ipv4_tcp_lp_c-v1-1-058cc221499e@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>