PCI: Use of_node_name_eq() for node name comparisons

Convert string compares of DT node names to use of_node_name_eq() helper
instead. This removes direct access to the node name pointer.

Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Rob Herring <[e-mail]>
Signed-off-by: Bjorn Helgaas <[e-mail]>
Cc: Benjamin Herrenschmidt <[e-mail]>
Cc: Paul Mackerras <[e-mail]>
Cc: Michael Ellerman <[e-mail]>

drivers/pci/hotplug/rpaphp_core.c

···
  */
 int rpaphp_add_slot(struct device_node *dn)
 {
-	if (!dn->name || strcmp(dn->name, "pci"))
+	if (!of_node_name_eq(dn, "pci"))
 		return 0;
 
 	if (of_find_property(dn, "ibm,drc-info", NULL))