tcx: Fix splat in ingress_destroy upon tcx_entry_free

On qdisc destruction, the ingress_destroy() needs to update the correct
entry, that is, tcx_entry_update must NULL the dev->tcx_ingress pointer.
Therefore, fix the typo.

Fixes: e420bed0 ("bpf: Add fd-based tcx multi-prog infra with link support")
Reported-by:  <syzbot+bdcf141f362ef83335cf@syzkaller.appspotmail.com>
Reported-by:  <syzbot+b202b7208664142954fa@syzkaller.appspotmail.com>
Reported-by:  <syzbot+14736e249bce46091c18@syzkaller.appspotmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Tested-by:  <syzbot+bdcf141f362ef83335cf@syzkaller.appspotmail.com>
Tested-by:  <syzbot+b202b7208664142954fa@syzkaller.appspotmail.com>
Tested-by:  <syzbot+14736e249bce46091c18@syzkaller.appspotmail.com>
Tested-by: Petr Machata <petrm@nvidia.com>
Link: https://lore.kernel.org/r/20230721233330.5678-1-daniel@iogearbox.net


Signed-off-by: Jakub Kicinski <kuba@kernel.org>