zephyr/modusocket: Fix parameter in calls to net_context_get_XXX().
zephyr/modusocket: Fix parameter in calls to net_context_get_XXX().

The following simple usocket example throws an error EINVAL on connect

    import usocket
    s = usocket.socket()
    s.connect(usocket.getaddrinfo('www.micropython.org', 80)[0][-1])

    Traceback (most recent call last):
      File "<stdin>", line 1, in <module>
    OSError: [Errno 22] EINVAL

Fixing the context parameter in calls of net_context_get_family() and
net_context_get_type(), the connect works fine.

Tested on a nucleo_h743zi board.

pfalcon/micropython,pfalcon/micropython,pfalcon/micropython,pfalcon/micropython,pfalcon/micropython