dt-bindings: arm: fsl: add bindings for TQMa8x

TQMa8x is a SOM family using NXP i.MX8QM CPU family
MBa8x is an evaluation mainboard for this SOM.

Signed-off-by: Markus Niebel <Markus.Niebel@tq-group.com>
Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Frank Li <Frank.Li@nxp.com>

Author: tq-steina

Documentation/devicetree/bindings/arm/fsl.yaml

@@ -1428,6 +1428,16 @@ properties:
               - const: tq,imx8dxp-tqma8xdps         # TQ-Systems GmbH TQMa8XDPS SOM
               - const: fsl,imx8dxp
 
+      - description:
+          TQMa8x is a series of SOM featuring NXP i.MX8 system-on-chip
+          variants. It is designed to be clicked on different carrier boards
+          MBa8x is the starterkit
+        items:
+          - enum:
+              - tq,imx8qm-tqma8qm-mba8x   # TQ-Systems GmbH TQMa8QM SOM on MBa8x
+          - const: tq,imx8qm-tqma8qm      # TQ-Systems GmbH TQMa8QM SOM
+          - const: fsl,imx8qm
+
       - description: i.MX8ULP based Boards
         items:
           - enum: