MC: set default MPC_THR_MAX & MPC_MANTHR_MAX to 1

[bkueng]

With the updated mixer (#9062) it's safe to set maximum thrust to 1 (in both cases, if MC_AIRMODE is set, or not set).
So I see no reason to limit the maximum thrust.

@MaEtUgR @RomanBapst

[hamishwillee]

Just FYI MPC_THR_MAX is only mentioned in the parameter reference - no where else. With this change all guidance on why you would change this is gone. Is there any reason for having it at all - and if so, should we not document that somewhere?

[bkueng]

A reason to use it is that you can reduce the max thrust if the vehicle is too powerful. Might not be that important to keep it though.

[MaEtUgR]

@bkueng I agree but maybe we should handle this case globally such that you have a unified maximum throttle configuration, that would reduce the possibility of misconfiguration. For example as a result if you set it too low the vehicle would not have enough thrust to take off also in manual modes instead of a risk of suddenly droping in a certain mode.

[hamishwillee]

@MaEtUgR @bkueng Thanks. I propose we change the comment:

Comment: Limit max allowed thrust

TO

Comment: Limit max allowed thrust (i.e. on overpowered vehicles).

OK?