tty: synclink_gt: drop info messages from init/exit functions

It is preferred NOT to print anything from init and exit functions of a
module. (If everything goes fine.)

Signed-off-by: Jiri Slaby (SUSE) <jirislaby@kernel.org>
Link: https://lore.kernel.org/r/20230731090002.15680-5-jirislaby@kernel.org


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