media: usb: dvb-usb-v2: dvb_usb_core: remove redundant code in dvb_usb_fe_sleep

Check on return value and goto instruction is redundant as the code
that follows is the goto label err.

Addresses-Coverity-ID: 1268783
Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/usb/dvb-usb-v2/dvb_usb_core.c

@@ -628,8 +628,7 @@ static int dvb_usb_fe_sleep(struct dvb_frontend *fe)
 	}
 
 	ret = dvb_usbv2_device_power_ctrl(d, 0);
-	if (ret < 0)
-		goto err;
+
 err:
 	if (!adap->suspend_resume_active) {
 		adap->active_fe = -1;