tty: goldfish: Use tty_port_destroy() to destroy port

In the Linux kernel, the following vulnerability has been resolved:

tty: goldfish: Use tty_port_destroy() to destroy port

In goldfish_tty_probe(), the port initialized through tty_port_init()

should be destroyed in error paths.In goldfish_tty_remove(), qtty->port

also should be destroyed or else might leak resources.

Fix the above by calling tty_port_destroy().