tty/serial/altera_jtaguart: unwrap error log string

The error log string should be a single line, unwrap it.

Suggested-by: Jiri Slaby <jirislaby@kernel.org>
Link: https://lore.kernel.org/all/26034117-26b6-4eeb-bd66-969955b70e9b@kernel.org/


Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Link: https://lore.kernel.org/r/20241113114330.16995-1-tklauser@distanz.ch


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