misc: add i.MX8 misc driver

Add i.MX8 MISC driver to handle the communication between
A35 Core and SCU.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Anatolij Gustschin <agust@denx.de>
Cc: Stefano Babic <sbabic@denx.de>
diff --git a/drivers/misc/imx8/Makefile b/drivers/misc/imx8/Makefile
new file mode 100644
index 0000000..3395340
--- /dev/null
+++ b/drivers/misc/imx8/Makefile
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0+
+
+obj-y += scu.o