Fix volume control on Raspian. Correct some log messages
Fix volume control on Raspian. Correct some log messages

Main/Master volume mixer is called "PCM" on Raspian instead of "Master".

RobLoach/EmulationStation,pmoran13800/recalbox-emulationstation,recalbox/recalbox-emulationstation,cuhsat/EmulationStation,tbhova/EmulationStation,Spicykiwi/EmulationStation,cuhsat/EmulationStation,cuhsat/EmulationStation,jgeumlek/EmulationStation-tweaked,rjklawiter/ESpro,MisterTea/EmulationStation,cavedude00/EmulationStation,jrassa/EmulationStation,asmorgan24/EmulationStation-Marketplace,jrassa/EmulationStation,RobLoach/EmulationStation,joolswills/EmulationStation,emerrepengo/recalbox-emulationstation,rockaddicted/recalbox-emulationstation,mgoulartBR/retrobox-emulationstation,sdt/EmulationStation,joolswills/EmulationStation,cavedude00/EmulationStation,igungor/recalbox-emulationstation,igungor/recalbox-emulationstation,digitalLumberjack/recalbox-emulationstation,gr33k/EmulationStation,Herdinger/EmulationStation,tbhova/EmulationStation,hdo/EmulationStation,hdo/jukeboxV3FrontEnd,pimcgcd/esmod,jgeumlek/EmulationStation-tweaked,rjklawiter/ESpro,rockaddicted/recalbox-emulationstation,zigurana/EmulationStation,tbhova/EmulationStation,zigurana/EmulationStation,pmoran13800/recalbox-emulationstation,rjklawiter/ESpro,MisterTea/EmulationStation,Black3v3r/EmulationStation,RobLoach/EmulationStation,gr33k/EmulationStation,rockaddicted/recalbox-emulationstation,Herdinger/EmulationStation,hdo/jukeboxV3FrontEnd,zigurana/EmulationStation,joolswills/EmulationStation,recalbox/recalbox-emulationstation,hdo/jukeboxV3FrontEnd,MisterTea/EmulationStation,larrykoubiak/EmulationStation,hdo/EmulationStation,gr33k/EmulationStation,recalbox/recalbox-emulationstation,emerrepengo/recalbox-emulationstation,pimcgcd/esmod,tschires/emu,digitalLumberjack/recalbox-emulationstation,Herdinger/EmulationStation,asmorgan24/EmulationStation-Marketplace,sdt/EmulationStation,Krejza9/EmulationStation-sdlmixer,dimistor/EmulationStation,jrassa/EmulationStation,asmorgan24/EmulationStation-Marketplace,larrykoubiak/EmulationStation,tschires/emu,dimistor/EmulationStation,Spicykiwi/EmulationStation,mgoulartBR/retrobox-emulationstation,igungor/recalbox-emulationstation,Krejza9/EmulationStation-sdlmixer,Black3v3r/EmulationStation,sdt/EmulationStation,Krejza9/EmulationStation-sdlmixer,asmorgan24/EmulationStation-Marketplace,hevey/EmulationStation,tschires/emu,joolswills/EmulationStation,Black3v3r/EmulationStation,Spicykiwi/EmulationStation,hevey/EmulationStation,digitalLumberjack/recalbox-emulationstation,hevey/EmulationStation,hdo/EmulationStation,cavedude00/EmulationStation,dimistor/EmulationStation,jrassa/EmulationStation,mgoulartBR/retrobox-emulationstation,jgeumlek/EmulationStation-tweaked,pmoran13800/recalbox-emulationstation,emerrepengo/recalbox-emulationstation,larrykoubiak/EmulationStation,pimcgcd/esmod