A Tx IR calibration value structure.
This definition contains the set of persistent calibration values for OFDM on EFR32. You can set these beforehand and apply them at startup to save the time required to compute them. Any of these values may be set to RAIL_IRCAL_INVALID_VALUE to force the code to compute that calibration value.
Only supported on platforms with RAIL_SUPPORTS_OFDM_PA enabled.