scsi: qla2xxx: Cast explicitly to uint16_t / uint32_t

Casting a pointer to void * and relying on an implicit cast from void *
to uint16_t or uint32_t suppresses sparse warnings about endianness. Hence
cast explicitly to uint16_t and uint32_t. Additionally, remove superfluous
void * casts.

Link: https://lore.kernel.org/r/20200518211712.11395-13-bvanassche@acm.org
Cc: Arun Easi <aeasi@marvell.com>
Cc: Nilesh Javali <njavali@marvell.com>
Cc: Daniel Wagner <dwagner@suse.de>
Cc: Himanshu Madhani <himanshu.madhani@oracle.com>
Cc: Martin Wilck <mwilck@suse.com>
Cc: Roman Bolshakov <r.bolshakov@yadro.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Daniel Wagner <dwagner@suse.de>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>