powerpc/configs: Drop CONFIG_IP_NF_TARGET_CLUSTERIP

Drop CONFIG_IP_NF_TARGET_CLUSTERIP as it was removed in commit 9db5d918
("netfilter: ip_tables: remove clusterip target").

Signed-off-by: Trevor Woerner <twoerner@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230817115017.35663-5-twoerner@gmail.com