Spektrum DSMX satellite 8th channel support

Added support for 8th channel when using Spektrum DSMX satellite.
(old 1024 resolution 22ms DSM2 still work with 7 channels because those
doesn't support more than 7 channels)
Indentation in this entire function is not acceptable per https://github.com/multiwii/baseflight/wiki/CodingStyle
please reformat your code.