arm64: mvebu: Armada 3700: Add SPI device tree nodes

This patch adds the SPI device tree nodes that are still missing to
the Armada 3700 dts files.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Nadav Haklai <nadavh@marvell.com>
Cc: Kostya Porotchkin <kostap@marvell.com>
Cc: Wilson Ding <dingwei@marvell.com>
Cc: Victor Gu <xigu@marvell.com>
Cc: Hua Jing <jinghua@marvell.com>
Cc: Terry Zhou <bjzhou@marvell.com>
Cc: Hanna Hawa <hannah@marvell.com>
Cc: Haim Boot <hayim@marvell.com>
Reviewed-by: Jagan Teki <jteki@openedev.com>
diff --git a/arch/arm/dts/armada-37xx.dtsi b/arch/arm/dts/armada-37xx.dtsi
index 9e2efb8..bb14f54 100644
--- a/arch/arm/dts/armada-37xx.dtsi
+++ b/arch/arm/dts/armada-37xx.dtsi
@@ -140,6 +140,17 @@
 				reg = <0x1d00000 0x10000>, /* GICD */
 				      <0x1d40000 0x40000>; /* GICR */
 			};
+
+			spi0: spi@10600 {
+				compatible = "marvell,armada-3700-spi";
+				reg = <0x10600 0x50>;
+				#address-cells = <1>;
+				#size-cells = <0>;
+				#clock-cells = <0>;
+				clock-frequency = <160000>;
+				spi-max-frequency = <40000>;
+				status = "disabled";
+			};
 		};
 	};
 };