greybus: pwm: fix memory leak in error path

Fix memory leak in connection_init error path.

Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
diff --git a/drivers/staging/greybus/pwm.c b/drivers/staging/greybus/pwm.c
index e2ab6f5..3f508bf 100644
--- a/drivers/staging/greybus/pwm.c
+++ b/drivers/staging/greybus/pwm.c
@@ -261,7 +261,7 @@
 	ret = pwmchip_add(pwm);
 	if (ret) {
 		pr_err("Failed to register PWM\n");
-		return ret;
+		goto out_err;
 	}
 
 	return 0;