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: f5f633b18234 ("thermal/drivers/mediatek: Add the Low Voltage Thermal Sensor driver")
Signed-off-by: Christophe JAILLET <[e-mail]>
Reviewed-by: Matthias Brugger <[e-mail]>
Reviewed-by: AngeloGioacchino Del Regno <[e-mail]>
Signed-off-by: Daniel Lezcano <[e-mail]>
Link: https://lore.kernel.org/r/481d345233[e-mail]

drivers/thermal/mediatek/lvts_thermal.c

···
 
 		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);