NVMe: reduce admin queue depth as workaround for Samsung EPIC SQ errata

NVMe: reduce admin queue depth as workaround for Samsung EPIC SQ errata

Orabug: 25186219

PCIe analyzer tracing by Oracle and Samsung revealed an errata in Samsung's
firmware for EPIC SSDs where the invalid completion entries in admin queue
and IO queue can occur  when the queues straddle an 8MB DMA address boundary.

This patch limits admin queue depth to 64 for EPIC SSDs.

Signed-off-by: Ashok Vairavan <ashok.vairavan@oracle.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Dhaval Giani <dhaval.giani@oracle.com>