NA OFI: fix poll_get_fd and poll_try_wait when using NA_OFI_WAIT_SET
NA OFI: fix poll_get_fd and poll_try_wait when using NA_OFI_WAIT_SET

Problem resulted in verbs/psm2 providers to always wait

mercury-hpc/mercury,mercury-hpc/mercury,mercury-hpc/mercury,mercury-hpc/mercury