[mythtv] Slow lock Multiproto_plus

[Jacek]

> I finally got the MythTV working with the latest multiproto drivers (yay!)
> Unfortunately things are mighty slow:
>
> In VDR I get an instant lock, channel-hopping is very smooth. On MythTV,
> however, it takes a while to lock (I can see the entire L-A-M(-C)
> process) and it doesn't always work.

I go the MythTV 0.21 working with "mantis" - driver like multiproto, for
VP-1041 / SkyStar HD2. Channel-hopping was very slow too. I added modulation
settings to ioctl "DVBFE_SET_PARAMS" (to dvbfe_params) and now it's
fastest and always work.