New Turnigy9x transmitter fix; now complete (including Switch)

Now it also simulates switch positions according the switch warning
setting in model menu.
It also notices the don't care flag:
If don't care, switch value is actually read, even in switch warning
If switch position is defined, this value is used in mix until switch
warning is fullfilled or stopped

Code cost:
on stock: 94 bytes

I can do a smaller variant, but would not respect don't care flags. In
this situation, the readed switch position would be false or random.
Code shrink: 32 bytes
Currently active is the 94bytes version.