ARM: tegra: fix return value for debugfs init

tegra_powergate_debugfs_init() always returns -ENOMEM. It shouldn't do that
when registering the debugfs entry succeeded.
Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>

arch/arm/mach-tegra/powergate.c

@@ -237,14 +237,13 @@ static const struct file_operations powergate_fops = {
 int __init tegra_powergate_debugfs_init(void)
 {
 	struct dentry *d;
-	int err = -ENOMEM;
 
 	d = debugfs_create_file("powergate", S_IRUGO, NULL, NULL,
 		&powergate_fops);
 	if (!d)
 		return -ENOMEM;
 
-	return err;
+	return 0;
 }
 
 #endif