mtd: nand: pxa3xx: devicetree binding update

Since the driver supports the new compatible string, the binding
documentation must be updated to reflect it.
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Acked-by: Jason Cooper <jason@lakedaemon.net>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>

Documentation/devicetree/bindings/mtd/pxa3xx-nand.txt

@@ -2,7 +2,9 @@ PXA3xx NAND DT bindings
 
 Required properties:
 
- - compatible:		Should be "marvell,pxa3xx-nand"
+ - compatible:		Should be set to one of the following:
+			marvell,pxa3xx-nand
+			marvell,armada370-nand
  - reg: 		The register base for the controller
  - interrupts:		The interrupt to map
  - #address-cells:	Set to <1> if the node includes partitions