Platform: OLPC: Fix memleak in olpc_ec_probe

When devm_regulator_register() fails, ec should be
freed just like when olpc_ec_cmd() fails.

Fixes: 231c0c21 ("Platform: OLPC: Add a regulator for the DCON")
Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

drivers/platform/olpc/olpc-ec.c

@@ -439,7 +439,9 @@ static int olpc_ec_probe(struct platform_device *pdev)
 								&config);
 	if (IS_ERR(ec->dcon_rdev)) {
 		dev_err(&pdev->dev, "failed to register DCON regulator\n");
-		return PTR_ERR(ec->dcon_rdev);
+		err = PTR_ERR(ec->dcon_rdev);
+		kfree(ec);
+		return err;
 	}
 
 	ec->dbgfs_dir = olpc_ec_setup_debugfs();