He won't get banned from PL for 6 months. PL will not be able to nor allowed to. This is a FIFA matter and they should ban him from 10 competitive Internationals. I hope they do but knowing them they will say 'inconclusive' because they want their big star men playing. We will see.
However there is no doubt that if he stays at Liverpool or if he moves to La Liga he will be available for the first game of the season because this is a FIFA matter and not a UEFA or domestic match. Pity because it would be nice to have him out of the european game for good due to his non football problems (diving, feigning, assault) and pity because without these problems he is one of THE BEST footballers in the world, maybe even No1 in the world at the moment!!!