serial: pass struct uart_state to uart_line_info()

uart_line_info() wants to work with struct uart_state. Do not pass a
driver and an index. Pass the precomputed struct directly.

Signed-off-by: Jiri Slaby (SUSE) <jirislaby@kernel.org>
Link: https://lore.kernel.org/r/20250317070046.24386-27-jirislaby@kernel.org


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>