linux-imx

can: flexcan: add CAN wakeup function for i.MX8

The System Controller Firmware (SCFW) is a low-level system function
which runs on a dedicated Cortex-M core to provide power, clock, and
resource management. It exists on some i.MX8 processors. e.g. i.MX8QM
(QM, QP), and i.MX8QX (QXP, DX).

SCU driver manages the IPC interface between host CPU and the
SCU firmware running on M4.

For i.MX8, stop mode request is controlled by System Controller Unit(SCU)
firmware.

Signed-off-by: Joakim Zhang <qiangqing.zhang@nxp.com>