Patch for Prof Tuners 7500 USB
If you need make tuner works on your linux device, just put dvb-usb-p7500.fw on your /lib/firmware
References:
http://www.forum.free-x.de/wbb/index.php?page=Thread&threadID=798&pageNo=1
https://www.linuxtv.org/wiki/index.php/Prof_Revolution_DVB-S2_7500_USB