[media] helene: fix memory leak when heleno_x_pon fails

The error return path of failed calls to heleno_x_pon leak
memory because priv is not kfree'd.  Fix this by kfree'ing
priv before returning.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Abylay Ospan <aospan@netup.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/dvb-frontends/helene.c

@@ -987,8 +987,10 @@ struct dvb_frontend *helene_attach_s(struct dvb_frontend *fe,
 	if (fe->ops.i2c_gate_ctrl)
 		fe->ops.i2c_gate_ctrl(fe, 1);
 
-	if (helene_x_pon(priv) != 0)
+	if (helene_x_pon(priv) != 0) {
+		kfree(priv);
 		return NULL;
+	}
 
 	if (fe->ops.i2c_gate_ctrl)
 		fe->ops.i2c_gate_ctrl(fe, 0);
@@ -1021,8 +1023,10 @@ struct dvb_frontend *helene_attach(struct dvb_frontend *fe,
 	if (fe->ops.i2c_gate_ctrl)
 		fe->ops.i2c_gate_ctrl(fe, 1);
 
-	if (helene_x_pon(priv) != 0)
+	if (helene_x_pon(priv) != 0) {
+		kfree(priv);
 		return NULL;
+	}
 
 	if (fe->ops.i2c_gate_ctrl)
 		fe->ops.i2c_gate_ctrl(fe, 0);