atv_demod: Fix non standard for analog signal [1/1]

atv_demod: Fix non standard for analog signal [1/1]

PD#TV-1549, PD#TV-2829, PD#TV-2830

Problem:
Fix non standard for analog signal.

Solution:
1.Add non standard config 3 for analog signal.
2.Fix non standard default value.
3.Fix audio control register an bits.
4.After correcting the frequency offset success,
 reset tuner to prevent audio from identifying errors.

Verify:
verified by x301

Change-Id: I65335dbe9ce9dc66d4ccaae3c1ff591660790616
Signed-off-by: nengwen.chen <nengwen.chen@amlogic.com>