scsi: fas216: Introduce the function fas216_queue_command_internal()

This patch does not change any functionality but prepares for removal of
the second argument of the fas216_queue_command_lck() function.

Link: https://lore.kernel.org/r/20211007204618.2196847-13-bvanassche@acm.org


Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>