armv8: fsl-layerscape: Put SATA code under SATA configs

It is not necessary for every SoC to have 2 SATA controller.
So put SATA1, SATA2 code under respective defines.

Signed-off-by: Prabhakar Kushwaha <prabhakar.kushwaha@nxp.com>
Signed-off-by: Ashish Kumar <Ashish.Kumar@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>