ARM: dts: ixp4xx: Add crypto engine

Add the crypto engine as a child of the NPE.

Link: https://lore.kernel.org/r/20210605161007.3397216-1-linus.walleij@linaro.org
Cc: Corentin Labbe <clabbe@baylibre.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Olof Johansson <olof@lixom.net>

arch/arm/boot/dts/intel-ixp4xx.dtsi

@@ -113,6 +113,14 @@ timer@c8005000 {
 		npe: npe@c8006000 {
 			compatible = "intel,ixp4xx-network-processing-engine";
 			reg = <0xc8006000 0x1000>, <0xc8007000 0x1000>, <0xc8008000 0x1000>;
+
+			/* NPE-C contains a crypto accelerator */
+			crypto {
+				compatible = "intel,ixp4xx-crypto";
+				intel,npe-handle = <&npe 2>;
+				queue-rx = <&qmgr 30>;
+				queue-txready = <&qmgr 29>;
+			};
 		};
 
 		/* This is known as EthB */