Reduce maximum servos from 10 to 8.
1) the 2 extra servos were not used for anything, yet. 2) the MSP packet to set ALL the servo configurations in one go is larger than the MSP input buffer size. Likely the MSP_SET_SERVO_CONF should be updated with command that takes an index of a servo to configure, as per mode ranges/colors/leds/etc. Fixes #1002