dt-bindings: arm: add TQMa8Xx boards

TQMa8Xx is a SOM series featuring NXP i.MX8X SoC.
They are called TQMa8XQP and TQMa8XDP respectively.
MBa8Xx 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: Marco Felsch <m.felsch@pengutronix.de>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

Documentation/devicetree/bindings/arm/fsl.yaml

@@ -1232,6 +1232,22 @@ properties:
           - const: toradex,colibri-imx8x
           - const: fsl,imx8qxp
 
+      - description:
+          TQMa8Xx is a series of SOM featuring NXP i.MX8X system-on-chip
+          variants. It is designed to be clicked on different carrier boards
+          MBa8Xx is the starterkit
+        oneOf:
+          - items:
+              - enum:
+                  - tq,imx8dxp-tqma8xdp-mba8xx # TQ-Systems GmbH TQMa8XDP SOM on MBa8Xx
+              - const: tq,imx8dxp-tqma8xdp     # TQ-Systems GmbH TQMa8XDP SOM (with i.MX8DXP)
+              - const: fsl,imx8dxp
+          - items:
+              - enum:
+                  - tq,imx8qxp-tqma8xqp-mba8xx # TQ-Systems GmbH TQMa8XQP SOM on MBa8Xx
+              - const: tq,imx8qxp-tqma8xqp     # TQ-Systems GmbH TQMa8XQP SOM (with i.MX8QXP)
+              - const: fsl,imx8qxp
+
       - description: i.MX8ULP based Boards
         items:
           - enum: