staging: wilc1000: fix line over 80 chars issue in host_int_handle_disconnect()

Fix line over 80 char issue in host_int_handle_disconnect() by using
temp variable to hold the 'wilc_connect_result' function pointer.

Signed-off-by: Ajay Singh <ajay.kathat@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>