soc: xtensa: add support for specifying the service port

Add specifying the port for the remote cavstool remote service.
Ex.

    west flash --remote-host {host}:{port} \
               --pty {host}:{port}

Specify the port is optional when running west.

And another major change is now we have to specify the remote log
service by --pty to make it output the log message immediately.
Previously it will output directly. Why we make this change is
because this is more close to the behavior we use west flash.

Fixes. #46865

Signed-off-by: Enjia Mai <enjia.mai@intel.com>