radio: added simple TDM support
radio: added simple TDM support

use a 8 bit header for clock sync and odd/even transmit bit

geeksville/SiK,GaloisInc/smaccmpilot-SiK,tomszilagyi/SiK,nusepo/SiK,RFDesign/SiK,jschall/SiK,phelpsw/SiK,weera00/SiK,joeman155/SiK,tridge/DavisSi1000,weera00/SiK,tomszilagyi/SiK,RFDesign/SiK,GaloisInc/smaccmpilot-SiK,RFDesign/SiK,gardners/SiK,tridge/DavisSi1000,joeman155/SiK,chrissnell/DavisSi1000,tridge/DavisSi1000,tridge/SiK,joeman155/SiK,nusepo/SiK,Dronecode/SiK,davidbuzz/SiK,chrissnell/DavisSi1000,RFDesign/SiK,phelpsw/SiK,Serveurperso/SiK,Dronecode/SiK,jschall/SiK,Serveurperso/SiK,gardners/SiK,Dronecode/SiK,tridge/SiK,RFDesign/SiK,tomszilagyi/SiK,davidbuzz/SiK,gardners/SiK,joeman155/SiK,chrissnell/DavisSi1000,mikeclement/SiK,jschall/SiK,phelpsw/SiK,weera00/SiK,GaloisInc/smaccmpilot-SiK,tridge/DavisSi1000,weera00/SiK,tridge/SiK,geeksville/SiK,tridge/SiK,phelpsw/SiK,joeman155/SiK,davidbuzz/SiK,nusepo/SiK,tridge/SiK,nusepo/SiK,Serveurperso/SiK,chrissnell/DavisSi1000,mikeclement/SiK,mikeclement/SiK,LorenzMeier/SiK,Dronecode/SiK,LorenzMeier/SiK,tomszilagyi/SiK,jschall/SiK,geeksville/SiK,geeksville/SiK,phelpsw/SiK,weera00/SiK,tomszilagyi/SiK,GaloisInc/smaccmpilot-SiK,chrissnell/DavisSi1000,davidbuzz/SiK,nusepo/SiK,geeksville/SiK,davidbuzz/SiK,LorenzMeier/SiK,mikeclement/SiK,mikeclement/SiK,gardners/SiK,Serveurperso/SiK,LorenzMeier/SiK