scsi: libsas: Handle non-TMF codes in sas_scsi_find_task()

LLDD TMF callbacks may return linux or other error codes instead of TMF
codes. This may cause problems in sas_scsi_find_task() ->
.lldd_query_task(), as only TMF codes are handled there. As such, we may
not return a task_disposition type from sas_scsi_find_task(). Function
sas_eh_handle_sas_errors() only handles that type, and will only progress
error handling for those recognised types.

Return TASK_ABORT_FAILED upon exit on the assumption that the command may
still be alive and error handling should be escalated.

Link: https://lore.kernel.org/r/[email protected]
Tested-by: Damien Le Moal <[email protected]>
Signed-off-by: John Garry <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>

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