Remote device EEP A5-08-02 disable parameter set.

A remote device using the EEP A5-08-02 change the parameters by received
radio packets.
The parameters must not be changed by calls to set parameter.
Merge pull request #1 from maggu2810/rd-a50802-remove-set-parameter

Remote device EEP A5-08-02 disable parameter set.
Fix power voltage report.
Merge pull request #2 from maggu2810/rd-a50802-power-voltage-fix

Fix power voltage report.