linux: support for TechniSat SkyStar S2 card with CX24120-13Z frontend
this closes #2100, discussion http://openelec.tv/forum/83-dvb-s-s2-support/63061-technisat-skystar-s2-pci-not-supported#66807
patch from Jannis Achstetter http://patchwork.linuxtv.org/patch/10575/ originally made by Sergey Tyurin