[POWERPC] Don't cast kmalloc return value in ibmebus.c

kmalloc() returns a void pointer so there is absolutely no need to
cast it in ibmebus_chomp().
Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

arch/powerpc/kernel/ibmebus.c

@@ -371,7 +371,8 @@ static int ibmebus_match_path(struct device *dev, void *data)
 
 static char *ibmebus_chomp(const char *in, size_t count)
 {
-	char *out = (char*)kmalloc(count + 1, GFP_KERNEL);
+	char *out = kmalloc(count + 1, GFP_KERNEL);
+
 	if (!out)
 		return NULL;