imx: imx8mm: Add support for Kontron Electronics SL/BL i.MX8M-Mini boards (N801x)

The Kontron SoM-Line i.MX8MM (N801x) by Kontron Electronics GmbH is a SoM
module with an i.MX8M-Mini SoC, 1/2/4 GB LPDDR4 RAM, SPI NOR, eMMC and PMIC.

The matching evaluation boards (Board-Line) have 2 Ethernets, USB 2.0, HDMI/LVDS,
SD card, CAN, RS485 and much more.

Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Reviewed-by: Stefano Babic <sbabic@denx.de>
Tested-by: Heiko Thiery <heiko.thiery@gmail.com>
diff --git a/board/kontron/sl-mx8mm/imximage.cfg b/board/kontron/sl-mx8mm/imximage.cfg
new file mode 100644
index 0000000..f101f3d
--- /dev/null
+++ b/board/kontron/sl-mx8mm/imximage.cfg
@@ -0,0 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2019 Kontron Electronics GmbH
+ */
+
+#define __ASSEMBLY__
+
+BOOT_FROM	sd
+LOADER		u-boot-spl-ddr.bin	0x7E1000