This patch is doing what was done by
"dm: ahci: Correct uclass private data"
(sha1: bfc1c6b483)
with reverting pointer to allocated space.
It is questionable if sata_ceva should use UCLASS_SCSI or move to
UCLASS_SATA but this investigation hasn't been done yet.
Signed-off-by: Michal Simek <michal.simek@xilinx.com>