si2157: Revert to latest official driver (tested and working - needs fw).
si2168: DVB-C working.
saa716x_budget: Add support for TBS6285 (need testing).
saa716x: Fix TBS6985 demod 0 and 2 tuner i2c address.
si2168: Merge latest official driver changes. Firmware names should be final now.
si2168: Porperly wake up demod from sleep on probe and init funcs.
si2157: Force 8MHz bandwidth when using SYS_DVBC_ANNEX_A.
si2168: Remove test for device on probe. Revert init wake up cmds.
si2157: Use name si2157_ops instead of si2157_tuner_ops (harmonize with si2168)

Signed-off-by: Olli Salonen <olli.salonen@iki.fi>