[SPARC64]: Fix PCI rework to adhere to of_get_property() const return.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc64/kernel/pci.c b/arch/sparc64/kernel/pci.c
index 8a7c699..023af41 100644
--- a/arch/sparc64/kernel/pci.c
+++ b/arch/sparc64/kernel/pci.c
@@ -551,7 +551,7 @@
 	ranges = of_get_property(node, "ranges", &len);
 	simba = 0;
 	if (ranges == NULL) {
-		char *model = of_get_property(node, "model", NULL);
+		const char *model = of_get_property(node, "model", NULL);
 		if (model && !strcmp(model, "SUNW,simba")) {
 			simba = 1;
 		} else {