scsi: libsas: Move SMP task handlers to core

Move the SMP task handlers to the core host code as they will be re-used
for executing internal abort and TMF tasks.

Link: https://lore.kernel.org/r/1645112566-115804-7-git-send-email-john.garry@huawei.com


Tested-by: Yihang Li <liyihang6@hisilicon.com>
Tested-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>