libcaliptra caliptra_ready_for_firmware waits indefinitely

[bgilsrudHPE]

The description of the libcaliptra caliptra_ready_for_firmware function doesn't match the implementation. The description implies it will return the status of Caliptra's readiness for firmware. The implementation waits for Caliptra report it's ready for firmware before returning the status (which is always true). I was expecting an implementation closer to the caliptra_ready_for_fuses function.