uboot-imx

MLK-14938-18 sata: Add i.MX8 SATA support

- some delay is required between SATA_CTRL0 RST SET and CLR.
  Otherwise, sata phy link would be down.
- specific the ahci modification by imx8qm platform.

Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>
Signed-off-by: Ye Li <ye.li@nxp.com>
(cherry picked from commit 83812d4d636d98afdcb617a3aeab7b037e884aa1)