Merge branch 'bpf-fix-linked-register-tracking'

Puranjay Mohan says:

====================
bpf: Fix linked register tracking

This patch fixes the linked register tracking when multiple links from
the same register are created with a sync between the creation of these
links. The sync corrupts the id of the register and therefore the second
link is not created properly. See the patch description to understand
more.

The fix is to preserve the id while doing the sync similar to the off.
====================

Link: https://patch.msgid.link/20260115151143.1344724-1-puranjay@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>