thermal/drivers/mediatek/lvts_thermal: Fix a memory leak in an error handling path

If devm_krealloc() fails, then 'efuse' is leaking.
So free it to avoid a leak.

Fixes: f5f633b1 ("thermal/drivers/mediatek: Add the Low Voltage Thermal Sensor driver")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/481d345233862d58c3c305855a93d0dbc2bbae7e.1706431063.git.christophe.jaillet@wanadoo.fr

drivers/thermal/mediatek/lvts_thermal.c

@@ -719,8 +719,10 @@ static int lvts_calibration_read(struct device *dev, struct lvts_domain *lvts_td
 
 		lvts_td->calib = devm_krealloc(dev, lvts_td->calib,
 					       lvts_td->calib_len + len, GFP_KERNEL);
-		if (!lvts_td->calib)
+		if (!lvts_td->calib) {
+			kfree(efuse);
 			return -ENOMEM;
+		}
 
 		memcpy(lvts_td->calib + lvts_td->calib_len, efuse, len);