powerpc/topology: Remove the unused parent_node() macro
Commit a7be6e5a ("mm: drop useless local parameters of __register_one_node()") removes the last user of parent_node(). The parent_node() macro in POWERPC platform is unnecessary. Remove it for cleanup. Reported-by: NMichael Ellerman <mpe@ellerman.id.au> Signed-off-by: NDou Liyang <douly.fnst@cn.fujitsu.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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