Send voltage as ID_VOLT type.

Signed-off-by: Moritz Ulrich <moritz@tarn-vedra.de>
Send voltage every 125ms. (200ms is specified in PDF)

Signed-off-by: Moritz Ulrich <moritz@tarn-vedra.de>
Send voltage via ID_VOLT and ID_VOLTAGE_AMP.

Signed-off-by: Moritz Ulrich <moritz@tarn-vedra.de>
Correct bitshift.
Merge branch 'frsky-voltage' of https://github.com/the-kenny/baseflight into frsky_voltage

Conflicts:
	src/telemetry.c