userspace/wrsw_hal: retry when rts_get_state fails
Sometimes it happens at boot that rts_get_state fails. It may be due to race
condition with ppsi or something else. Anyway try again when rts_get_state
fails.
Additionally print message when got timeout from tmo_expired.
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>
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