In esp32p4, the MCPWM has a new feature, mainly ETM-oriented.
Each operator has two event comparators, can generate an event
when the count value of the timer that operator connects is equal
to the value of event comparator.
The default zero input gpio num is 0. Users need to set it additionally
when not use zero input signal. It may become a breaking change.
Add an enable flag to avoid it.
