device-fsl

MA-14130-1 Build atf from code for imx8mq aiy

The ddr training code is updated, which will work fine
with atf 2.0. Remove the pre-built binary and build the
atf form source code.

Test: build and boot on imx8mq aiy.

Change-Id: I614df246113decfcdcd4b89fe788486b75184fec
Signed-off-by: Ji Luo <ji.luo@nxp.com>
Reviewed-on: http://androidsource.ap.freescale.net/project/7457
Reviewed-by: Wang Haoran <elven.wang@nxp.com>