powerpc/mce: use early_cpu_to_node() in mce_init()

cpu_to_node() is not yet available (setup_arch() is called before
setup_per_cpu_areas() by start_kernel()).

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220711030653.150950-1-npiggin@gmail.com

arch/powerpc/kernel/mce.c

@@ -756,7 +756,7 @@ void __init mce_init(void)
 		mce_info = memblock_alloc_try_nid(sizeof(*mce_info),
 						  __alignof__(*mce_info),
 						  MEMBLOCK_LOW_LIMIT,
-						  limit, cpu_to_node(i));
+						  limit, early_cpu_to_node(i));
 		if (!mce_info)
 			goto err;
 		paca_ptrs[i]->mce_info = mce_info;