m68k: defconfig: Update defconfigs for v6.17-rc1

  - Enable Netfilter legacy tables support,
  - Drop CONFIG_IP_NF_FILTER=m, CONFIG_IP_NF_MANGLE=m,
    CONFIG_IP6_NF_FILTER=m, and CONFIG_IP6_NF_MANGLE=m (auto-modular
    since commit 9fce66583f06c212 ("netfilter: Exclude LEGACY TABLES on
    PREEMPT_RT.")),
  - Enable legacy EBTABLES support (no longer auto-selected since commit
    9fce66583f06c212 ("netfilter: Exclude LEGACY TABLES on
    PREEMPT_RT.")),
  - Drop CONFIG_CDROM_PKTCDVD=m (removed in commit 1cea5180f2f812c4
    ("block: remove pktcdvd driver")),
  - Move CONFIG_CRC_BENCHMARK=y (moved in commit 89a51591405e09a8
    ("lib/crc: Move files into lib/crc/")).

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Link: https://patch.msgid.link/012bc96a01eef989b39eedbe84591bd50c022e57.1754904412.git.geert@linux-m68k.org