[POWERPC] get_property returns const

This just tidies up some of the remains.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>

sound/aoa/core/snd-aoa-gpio-feature.c

@@ -55,7 +55,7 @@ static struct device_node *get_gpio(char *name,
 				    int *gpioactiveptr)
 {
 	struct device_node *np, *gpio;
-	u32 *reg;
+	const u32 *reg;
 	const char *audio_gpio;
 
 	*gpioptr = -1;
@@ -84,7 +84,7 @@ static struct device_node *get_gpio(char *name,
 			return NULL;
 	}
 
-	reg = (u32 *)get_property(np, "reg", NULL);
+	reg = get_property(np, "reg", NULL);
 	if (!reg)
 		return NULL;
 
@@ -96,7 +96,7 @@ static struct device_node *get_gpio(char *name,
 	if (*gpioptr < 0x50)
 		*gpioptr += 0x50;
 
-	reg = (u32 *)get_property(np, "audio-gpio-active-state", NULL);
+	reg = get_property(np, "audio-gpio-active-state", NULL);
 	if (!reg)
 		/* Apple seems to default to 1, but
 		 * that doesn't seem right at least on most