ARM: mvebu: add kirkwood compatibles for cloudengine boards

This adds the compatible strings for Cloudengine PogoPlug E02 and
series 4. The former already has a devicetree in the kernel.

Cc: devicetree@vger.kernel.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>

Documentation/devicetree/bindings/arm/marvell,kirkwood.txt

@@ -24,6 +24,8 @@ board. Currently known boards are:
 "buffalo,lswxl"
 "buffalo,lsxhl"
 "buffalo,lsxl"
+"cloudengines,pogo02"
+"cloudengines,pogoplugv4"
 "dlink,dns-320"
 "dlink,dns-320-a1"
 "dlink,dns-325"