pvr: do not ignore scene markers for edl

[FernetMenta]

I see no reason why scene markers should be ignored. it's the only type vdr supports. with regard on vnsi this is a fix.

[opdenkamp]

i don't know either. @fetzerch any idea why you commented that part out? i've overlooked that part when i pulled it

[fetzerch]

Yes, the reason was, that Action.SCENE was commented out and I couldn't do cut.action = SCENE;
(https://github.com/xbmc/xbmc/blob/master/xbmc/cores/dvdplayer/Edl.h#L37).
So, I thought that the scene markers are disabled for some reason; Didn't knew about the AddSceneMarker. Sry.