Revert "scsi: core: Add struct for args to execution functions"

This reverts commit cf33e6ca which is
commit d0949565 upstream.

It is known to cause problems and has asked to be dropped.

Link: https://lore.kernel.org/r/yq1frvvpymp.fsf@ca-mkp.ca.oracle.com


Cc: Tasos Sahanidis <tasos@tasossah.com>
Cc: Ewan D. Milne <emilne@redhat.com>
Cc: Bart Van Assche <bvanassche@acm.org>
Cc: Tasos Sahanidis <tasos@tasossah.com>
Cc: Martin K. Petersen <martin.petersen@oracle.com>
Cc: James Bottomley <jejb@linux.ibm.com>
Cc: Sasha Levin <sashal@kernel.org>
Reported-by: John David Anglin <dave.anglin@bell.net>
Reported-by: Cyril Brulebois <kibi@debian.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>