HID: hid-sensor-custom: Fix big on-stack allocation in hid_sensor_custom_get_known()

struct hid_sensor_custom_properties is currently 384 bytes big, which consumes
too much stack space for no good reason. Make it dynamically allocated.

Fixes: 98c062e8 ("HID: hid-sensor-custom: Allow more custom iio sensors")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

drivers/hid/hid-sensor-custom.c

@@ -911,21 +911,28 @@ hid_sensor_custom_get_known(struct hid_sensor_hub_device *hsdev,
 	int ret;
 	const struct hid_sensor_custom_match *match =
 		hid_sensor_custom_known_table;
-	struct hid_sensor_custom_properties prop;
+	struct hid_sensor_custom_properties *prop;
 
-	ret = hid_sensor_custom_properties_get(hsdev, &prop);
+	prop = kmalloc(sizeof(struct hid_sensor_custom_properties), GFP_KERNEL);
+	if (!prop)
+		return -ENOMEM;
+
+	ret = hid_sensor_custom_properties_get(hsdev, prop);
 	if (ret < 0)
-		return ret;
+		goto out;
 
 	while (match->tag) {
-		if (hid_sensor_custom_do_match(hsdev, match, &prop)) {
+		if (hid_sensor_custom_do_match(hsdev, match, prop)) {
 			*known = match;
-			return 0;
+			ret = 0;
+			goto out;
 		}
 		match++;
 	}
-
-	return -ENODATA;
+	ret = -ENODATA;
+out:
+	kfree(prop);
+	return ret;
 }
 
 static struct platform_device *