staging: ti-soc-thermal: propagate error code

While writing talert thresholds, propagate the error code from
ti_bandgap_update_alert_threshold to the caller of
_ti_bandgap_write_threshold.
Signed-off-by: Eduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/ti-soc-thermal/ti-bandgap.c

@@ -511,7 +511,7 @@ static int _ti_bandgap_write_threshold(struct ti_bandgap *bgp, int id, int val,
 		goto exit;
 
 	spin_lock(&bgp->lock);
-	ti_bandgap_update_alert_threshold(bgp, id, adc_val, hot);
+	ret = ti_bandgap_update_alert_threshold(bgp, id, adc_val, hot);
 	spin_unlock(&bgp->lock);
 
 exit: