syzbot: coverage regression in net/bridge/netfilter

[tarasmadan]

Describe the bug
Regressions happened in 'upstream' from July 2025 (31 days) to August 2025
(31 days).
Web version:
https://syzkaller.appspot.com/upstream/coverage?dateto=2025-08-31&min-cover-lines-drop=50&order-by-cover-lines-drop=1&period=month&period_count=2

Blocks diff,    Path
         -67    /kernel/bpf/cgroup.c
        -314    /net/bridge/netfilter/ebtables.c
        -140    /net/ipv4/netfilter/ip_tables.c
        -120    /net/ipv4/netfilter/arp_tables.c
        -138    /net/ipv6/netfilter/ip6_tables.c
        -125    /net/netfilter/x_tables.c

Probable root cause: netfilter: add back NETFILTER_XTABLES dependencies

[tarasmadan]

The coverage is recovering.