linux-imx

ahci: qoriq: workaround for errata A-379364 on lx2160a

There is a erratum on lx2160a which is: "SATA link is
going down sometime during sata initialization"
The workaround for it is to reset the lane. This patch
implements this workaround.
This erratum only exists on lx2160 Rev1, will be addressed
on Rev2 and later.

Signed-off-by: Peng Ma <peng.ma@nxp.com>