[POWERPC] Constify & voidify get_property()

Now that get_property() returns a void *, there's no need to cast its
return value. Also, treat the return value as const, so we can
constify get_property later.

powerpc core changes.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/kernel/rtas_pci.c b/arch/powerpc/kernel/rtas_pci.c
index cda0226..5a798ac 100644
--- a/arch/powerpc/kernel/rtas_pci.c
+++ b/arch/powerpc/kernel/rtas_pci.c
@@ -57,7 +57,7 @@
 
 static int of_device_available(struct device_node * dn)
 {
-        char * status;
+        const char *status;
 
         status = get_property(dn, "status", NULL);
 
@@ -178,7 +178,7 @@
 
 int is_python(struct device_node *dev)
 {
-	char *model = (char *)get_property(dev, "model", NULL);
+	const char *model = get_property(dev, "model", NULL);
 
 	if (model && strstr(model, "Python"))
 		return 1;
@@ -234,7 +234,7 @@
 unsigned long __devinit get_phb_buid (struct device_node *phb)
 {
 	int addr_cells;
-	unsigned int *buid_vals;
+	const unsigned int *buid_vals;
 	unsigned int len;
 	unsigned long buid;
 
@@ -247,7 +247,7 @@
 	if (phb->parent->parent)
 		return 0;
 
-	buid_vals = (unsigned int *) get_property(phb, "reg", &len);
+	buid_vals = get_property(phb, "reg", &len);
 	if (buid_vals == NULL)
 		return 0;
 
@@ -264,10 +264,10 @@
 static int phb_set_bus_ranges(struct device_node *dev,
 			      struct pci_controller *phb)
 {
-	int *bus_range;
+	const int *bus_range;
 	unsigned int len;
 
-	bus_range = (int *) get_property(dev, "bus-range", &len);
+	bus_range = get_property(dev, "bus-range", &len);
 	if (bus_range == NULL || len < 2 * sizeof(int)) {
 		return 1;
  	}
@@ -325,15 +325,15 @@
 	 * in chosen.
 	 */
 	if (of_chosen) {
-		int *prop;
+		const int *prop;
 
-		prop = (int *)get_property(of_chosen, "linux,pci-probe-only",
-					   NULL);
+		prop = get_property(of_chosen,
+				"linux,pci-probe-only", NULL);
 		if (prop)
 			pci_probe_only = *prop;
 
-		prop = (int *)get_property(of_chosen,
-					   "linux,pci-assign-all-buses", NULL);
+		prop = get_property(of_chosen,
+				"linux,pci-assign-all-buses", NULL);
 		if (prop)
 			pci_assign_all_buses = *prop;
 	}