MR: https://gitlab.com/redhat/centos-stream/src/kernel/centos-stream-9/-/merge_requests/1454

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2059161



Sync skb drop reasons with upstream to improve debuggability and visibility in
the net stack. This MR helps in understanding why a given packet is being
dropped.

One way of retrieving the skb drop reason is to hook to the kfree_skb tracepoint:

```
# perf record -e skb:kfree_skb -a sleep 10
# perf script
         swapper     0 [000] 45483.977088: skb:kfree_skb: skbaddr=0xffffa04859090f00 protocol=34525 location=0xffffffff9bc92940 reason: NOT_SPECIFIED
         swapper     0 [000] 45485.792919: skb:kfree_skb: skbaddr=0xffffa04143757900 protocol=34525 location=0xffffffff9bbd84bb reason: TCP_INVALID_SEQUENCE
```

Signed-off-by: Antoine Tenart <atenart@redhat.com>

Approved-by: Jarod Wilson <jarod@redhat.com>
Approved-by: Jiri Benc <jbenc@redhat.com>

Signed-off-by: Frantisek Hrbata <fhrbata@redhat.com>