Remove extra spaces from mixers before processing them. This gives us some more working space on IO for mixer processing.
Merge branch 'px4io-i2c' of github.com:PX4/Firmware into px4io-i2c-throttle
Merge branch 'px4io-i2c-throttle' of github.com:PX4/Firmware into px4io-i2c-throttle
Fixed minor scaling issue, throttle range still half