m68k: defconfig: Update defconfigs for v5.1-rc1

Actual changes:
     -CONFIG_FS_ENCRYPTION=m
     -CONFIG_NET_DEVLINK=m
     -CONFIG_NFT_CHAIN_NAT_IPV4=m
     -CONFIG_NFT_CHAIN_NAT_IPV6=m
     -CONFIG_NFT_MASQ_IPV4=m
     -CONFIG_NFT_MASQ_IPV6=m
     -CONFIG_NFT_REDIR_IPV4=m
     -CONFIG_NFT_REDIR_IPV6=m
     +CONFIG_CRYPTO_CTS=m
     +CONFIG_CRYPTO_XTS=m
     +CONFIG_TEST_STACKINIT=m
     +CONFIG_TEST_VMALLOC=m
     +# CONFIG_VALIDATE_FS_PARSER is not set
     +CONFIG_XDP_SOCKETS_DIAG=m

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>