hw-mgmt: sensors: Fix msn4700 lmsensors config

Fix lm_sensors config for msn4700.

1. Fix voltmon sensor names
2. Added to ignore not used sensors
3. Moved i2c bus alias to the top of config file

Bug: 4686090

Signed-off-by: Oleksandr Shamray <[email protected]>

Author: sholeksandr