powerpc/iseries: Use kstrdup

Use kstrdup when the goal of an allocation is copy a string into the
allocated region.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
expression from,to;
expression flag,E1,E2;
statement S;
@@

-  to = kmalloc(strlen(from) + 1,flag);
+  to = kstrdup(from, flag);
   ... when != \(from = E1 \| to = E1 \)
   if (to==NULL || ...) S
   ... when != \(from = E2 \| to = E2 \)
-  strcpy(to, from);
// </smpl>
Signed-off-by: NJulia Lawall <julia@diku.dk>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/platforms/iseries/vio.c

@@ -87,12 +87,11 @@ static struct device_node *new_node(const char *path,
 
 	if (!np)
 		return NULL;
-	np->full_name = kmalloc(strlen(path) + 1, GFP_KERNEL);
+	np->full_name = kstrdup(path, GFP_KERNEL);
 	if (!np->full_name) {
 		kfree(np);
 		return NULL;
 	}
-	strcpy(np->full_name, path);
 	of_node_set_flag(np, OF_DYNAMIC);
 	kref_init(&np->kref);
 	np->parent = of_node_get(parent);