scsi: lpfc: Kill lpfc_bus_reset_handler()

lpfc_bus_reset_handler() is really just a loop calling
lpfc_target_reset_handler() over all targets, which is what the error
handler will be doing anyway.

Link: https://lore.kernel.org/r/20220301143718.40913-2-hare@suse.de


Cc: James Smart <james.smart@broadcom.com>
Reviewed-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>