UPSTREAM: af_unix: Remove CONFIG_UNIX_SCM.

commit 99a7a5b9 upstream.

Originally, the code related to garbage collection was all in garbage.c.

Commit f4e65870 ("net: split out functions related to registering
inflight socket files") moved some functions to scm.c for io_uring and
added CONFIG_UNIX_SCM just in case AF_UNIX was built as module.

However, since commit 97154bcf ("af_unix: Kconfig: make CONFIG_UNIX
bool"), AF_UNIX is no longer built separately.  Also, io_uring does not
support SCM_RIGHTS now.

Let's move the functions back to garbage.c

Bug: 404256079
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Acked-by: Jens Axboe <axboe@kernel.dk>
Link: https://lore.kernel.org/r/20240129190435.57228-4-kuniyu@amazon.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Lee Jones <lee@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit 8eb55b66)
Signed-off-by: Lee Jones <joneslee@google.com>
Change-Id: I03d22aa94dca45db9d09e45bf97d8da36502e2a7