tty: serial: serial_txx9: remove struct uart_txx9_port

It's only a wrapper to struct uart_port, so unwrap the whole code.

No change in functionality is intended.

Signed-off-by: Jiri Slaby <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: Jiri Slaby