tty/serial: pmac_zilog: Don't check port->sysrq

uart_handle_sysrq_char() already handles it.

Signed-off-by: Dmitry Safonov <dima@arista.com>
Link: https://lore.kernel.org/r/20191213000657.931618-31-dima@arista.com


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