Input: ads7846 - release resources on failure for clean exit

Input device must be released(input_free_device) when ads7846_probe_dt
fails. This fixes the same by releasing resources on failure.

Signed-off-by: Pramod Gurav <[e-mail]>
Signed-off-by: Dmitry Torokhov <[e-mail]>

drivers/input/touchscreen/ads7846.c

···
 	pdata = dev_get_platdata(&spi->dev);
 	if (!pdata) {
 		pdata = ads7846_probe_dt(&spi->dev);
-		if (IS_ERR(pdata))
-			return PTR_ERR(pdata);
+		if (IS_ERR(pdata)) {
+			err = PTR_ERR(pdata);
+			goto err_free_mem;
+		}
 	}
 
 	ts->model = pdata->model ? : 7846;