alink_os: Warning: system_get_time is deprecated

[nicola-lunghi]

/home/user/esp-iot-solution/components/platforms/alink/adaptation/alink_os.c:273:5: warning: 'system_get_time' is deprecated [-Wdeprecated-declarations]
     return system_get_time() / 1000;
     ^
In file included from /home/user/esp-iot-solution/components/platforms/alink/adaptation/alink_os.c:25:0:
/home/user/esp-iot-solution/submodule/esp-idf/components/esp32/include/esp_system.h:96:10: note: declared here
 uint32_t system_get_time(void)  __attribute__ ((deprecated));
          ^

[allanchen24]

@nicola-lunghi Please replace return system_get_time() / 1000; with the code below:

    struct timeval now;
    gettimeofday(&now, NULL);
    return (now.tv_sec * 1000000 + now.tv_usec) / 1000;

Now the system_get_time() is deprecated, and use gettimeofday() to get system time.
We will fix this issue later. Thanks!