imx8mq/imx8mm: switch to MULTI_CONSOLE_API for debug uart support

Switch to MULTI_CONSOLE_API to make debug UART work.

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
(cherry picked from commit b9355f548ba6f1d969c4ad9c4b4a0c71f94c43db)
4 files changed