Unify telemetry driver (S.Port), fix 2861

[richardclli]

Fixes #2861

Summary of changes:
Unify the telemetry driver for all radios.

[richardclli]

There are 2 lines that appear in Tarnis driver but differ from the color radio driver, need to see what change is proper:

In telemetryPortInvertedInit, probeTimeFromStartBit used different values, how to merge this?
probeTimeFromStartBit = 23; //because pin is not probed immediately
// probeTimeFromStartBit = 25; // TODO: Tarnis used 25, how to merge?

In sportSendBuffer, can this line be omitted? This only appears in tarnis driver
// USART_ClearITPendingBit(TELEMETRY_USART, USART_IT_TC); // TODO: This requires? Only appear in tarnis driver

[richardclli]

I already tested this in TX16S and EL18, both works properly with ELRS.

[gagarinlg]

I think @raphaelcoeffic should do the review. I have never been in that part of the firmware and can not answer your todo-questions.

[richardclli]

I think @raphaelcoeffic should do the review. I have never been in that part of the firmware and can not answer your todo-questions.

@raphaelcoeffic Need your review ^.^

[richardclli]

Closed because it affects the module-api rework:
#3055