[POWERPC] scsi: 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-specific scsi driver changes.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/drivers/scsi/mesh.c b/drivers/scsi/mesh.c
index c887177..cee9758 100644
--- a/drivers/scsi/mesh.c
+++ b/drivers/scsi/mesh.c
@@ -1850,7 +1850,8 @@
 {
 	struct device_node *mesh = macio_get_of_node(mdev);
 	struct pci_dev* pdev = macio_get_pci_dev(mdev);
-	int tgt, *cfp, minper;
+	int tgt, minper;
+	const int *cfp;
 	struct mesh_state *ms;
 	struct Scsi_Host *mesh_host;
 	void *dma_cmd_space;
@@ -1939,7 +1940,7 @@
 	       	ms->tgts[tgt].current_req = NULL;
        	}
 
-	if ((cfp = (int *) get_property(mesh, "clock-frequency", NULL)))
+	if ((cfp = get_property(mesh, "clock-frequency", NULL)))
        		ms->clk_freq = *cfp;
 	else {
        		printk(KERN_INFO "mesh: assuming 50MHz clock frequency\n");