[SPARC/64] constify of_get_property return: sound

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/sound/sparc/amd7930.c b/sound/sparc/amd7930.c
index c899786..07962a3 100644
--- a/sound/sparc/amd7930.c
+++ b/sound/sparc/amd7930.c
@@ -1067,8 +1067,8 @@
 
 static int __devinit amd7930_obio_attach(struct device_node *dp)
 {
-	struct linux_prom_registers *regs;
-	struct linux_prom_irqs *irqp;
+	const struct linux_prom_registers *regs;
+	const struct linux_prom_irqs *irqp;
 	struct resource res, *rp;
 	int len;