mn88472: correct attach symbol name

Wrong symbol name causes demod attach failure.

Reported-by: Benjamin Larsson <benjamin@southpole.se>
Signed-off-by: Antti Palosaari <crope@iki.fi>
mn88472: add small delay to wait DVB-C lock

400ms delay seems to be enough in order to gain DVB-C lock.

Signed-off-by: Antti Palosaari <crope@iki.fi>
rtl2832: add muxed I2C adapter for demod itself

There was a deadlock between master I2C adapter and muxed I2C
adapter. Implement two I2C muxed I2C adapters and leave master
alone, just only for offering I2C adapter for these mux adapters.

Reported-by: Luis Alves <ljalvs@gmail.com>
Reported-by: Benjamin Larsson <benjamin@southpole.se>
Signed-off-by: Antti Palosaari <crope@iki.fi>
rtl2832: Fix deadlock on i2c mux select function.

Signed-off-by: Antti Palosaari <crope@iki.fi>