feat(imx8): add support for debug uart on lpuart1

Needed for TQMa8Xx on MBa8Xx. With this changes it is
possible to build:

$ make PLAT=imx8qx IMX_DEBUG_UART=1 DEBUG_CONSOLE=1 bl31

Signed-off-by: Markus Niebel <Markus.Niebel@tq-group.com>
Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Change-Id: If380845b254f30fe919ebb33c86130597c4b8ad3
2 files changed