Add RT_SENSOR_VENDOR_MELEXIS in sensor_cmd.c (#5966)
Add RT_SENSOR_VENDOR_MELEXIS in sensor_cmd.c (#5966)

* Add RT_SENSOR_VENDOR_MELEXIS in sensor_cmd.c

print vendor information of Melexis in the function sensor()
RT-Thread/rt-thread,RT-Thread/rt-thread,RT-Thread/rt-thread,RT-Thread/rt-thread,RT-Thread/rt-thread,RT-Thread/rt-thread,RT-Thread/rt-thread