package/tvheadend: Properly disable internal fetch of dvb-data

Fixes
http://autobuild.buildroot.net/results/a8a/a8a8e39d57b14f1a59c8e6322b511c761442ee3c/
http://autobuild.buildroot.net/results/227/2278a078af5cc2e9f36661ad11e70b7692481266/



Instead of patching the buildsystem just use the included option --disable-
dvbscan, therefore remove tvheadend-001-no-auto-download-dvbscans.patch

This should also point tvheadend to the right place for the dvb data according
to src/input/mpegts/scanfile.c:

  #if ENABLE_DVBSCAN
    path = "data/dvb-scan";
  #else
    path = "/usr/share/dvb";
  #endif

and the resulting binary:

strings tvheadend | grep "dvb-scan\|share\/dvb"
/usr/share/dvb

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Tested-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Acked-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>