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This patch adds support for NXP's imx SoC common
function support like topology, gic implementation.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>

Add NXP's imx SoC debug uart driver.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>

NXP's i.MX8 SoCs have system controller (M4 core)
which takes control of clock management, power management,
partition management, PAD management etc., other
clusters like Cortex-A35 can send out command via MU
(Message Unit) to system controller for clock/power
management etc..

This patch adds basic IPC(inter-processor communication) support.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>