Bluetooth: log advertisement packet length if it gets corrected

The error could indicate a problem with the Bluetooth device. It
is easier to investigate if the packet's actual length gets logged,
not just the fact that a discrepancy occurred.
Signed-off-by: NDaniels Umanovskis <du@axentia.se>
Reviewed-by: NAlain Michaud <alainm@chromium.org>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

net/bluetooth/hci_event.c

@@ -5396,7 +5396,8 @@ static void process_adv_report(struct hci_dev *hdev, u8 type, bdaddr_t *bdaddr,
 
 	/* Adjust for actual length */
 	if (len != real_len) {
-		bt_dev_err_ratelimited(hdev, "advertising data len corrected");
+		bt_dev_err_ratelimited(hdev, "advertising data len corrected %u -> %u",
+				       len, real_len);
 		len = real_len;
 	}