Documentation: DT: Add entry for DPAA2 console

This patch adds a devicetree binding documentation for
FSL's DPAA2 console.

Signed-off-by: Ioana Ciornei <[e-mail]>
Reviewed-by: Rob Herring <[e-mail]>
Signed-off-by: Li Yang <[e-mail]>

Documentation/devicetree/bindings/misc/fsl,dpaa2-console.txt

···
+DPAA2 console support
+
+Required properties:
+
+    - compatible
+        Value type: <string>
+        Definition: Must be "fsl,dpaa2-console".
+    - reg
+        Value type: <prop-encoded-array>
+        Definition: A standard property.  Specifies the region where the MCFBA
+                    (MC firmware base address) register can be found.

MAINTAINERS

···
 L:	[e-mail]
 L:	[e-mail]
 S:	Maintained
+F:	Documentation/devicetree/bindings/misc/fsl,dpaa2-console.txt
 F:	Documentation/devicetree/bindings/soc/fsl/
 F:	drivers/soc/fsl/
 F:	include/linux/fsl/