Remove tuning fallback code for delivery system.

The current driver tries DVB-S and then DVB-S2, or vice vera. In fact,
the DVB-S2 support in kernel 3.2 is not complete yet. The userspace
program currently specifies delivery system explicitly, there is no need
for the fallback code.

Google-Bug-Id: 19432272
Change-Id: I39fa650e2aa82c17a76c96067141b5f3e9f351f4
1 file changed