scsi: sym53c8xx_2: Rework reset handling

Split off the combined abort and device reset handling into distinct
functions. And rename the current device reset handler into a target reset
handler, seeing that it really is a target reset.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Link: https://lore.kernel.org/r/20231002154328.43718-15-hare@suse.de


Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>