KVM: PPC: Book3S HV: Replace kmalloc_node+memset with kzalloc_node

Replace kmalloc_node and memset with kzalloc_node
Signed-off-by: wangbo <wang.bo116@zte.com.cn>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>

arch/powerpc/kvm/book3s_hv.c

@@ -5342,13 +5342,11 @@ static int kvm_init_subcore_bitmap(void)
 			continue;
 
 		sibling_subcore_state =
-			kmalloc_node(sizeof(struct sibling_subcore_state),
+			kzalloc_node(sizeof(struct sibling_subcore_state),
 							GFP_KERNEL, node);
 		if (!sibling_subcore_state)
 			return -ENOMEM;
 
-		memset(sibling_subcore_state, 0,
-				sizeof(struct sibling_subcore_state));
 
 		for (j = 0; j < threads_per_core; j++) {
 			int cpu = first_cpu + j;