imx: kontron-sl-mx8mm: Adjust devicetree names, compatibles and model strings

This adjusts the names of the boards and SoMs to the official naming
used by Kontron marketing. These changes also affect devicetree
names and compatibles. The same changes have been submitted to the
Linux kernel.

Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Reviewed-by: Fabio Estevam <festevam@denx.de>
diff --git a/board/kontron/sl-mx8mm/MAINTAINERS b/board/kontron/sl-mx8mm/MAINTAINERS
index 5e68ae0..e4e12d3 100644
--- a/board/kontron/sl-mx8mm/MAINTAINERS
+++ b/board/kontron/sl-mx8mm/MAINTAINERS
@@ -1,7 +1,7 @@
 Kontron SL/BL i.MX8M Mini Boards (N801x)
 M:	Frieder Schrempf <frieder.schrempf@kontron.de>
 S:	Maintained
-F:	arch/arm/dts/imx8mm-kontron-n801x-*
+F:	arch/arm/dts/imx8mm-kontron*
 F:	board/kontron/sl-mx8mm
 F:	configs/kontron-sl-mx8mm_defconfig
 F:	doc/board/kontron/sl-mx8mm.rst