tty: serial: serial_txx9: remove info print from init

Remove the hello print among with version and name definitions. Drivers
should print nothing if they are successful.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20220224111028.20917-3-jslaby@suse.cz


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