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: Daniels Umanovskis <du@axentia.se>
Reviewed-by: Alain Michaud <alainm@chromium.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>