arm/dts: omap4-sdp: Add ks8851 ethernet SPI device

Add an ethernet SPI chip in the OMAP4 SDP/Blaze board DTS file.

Add a fixed regulator node controlled by a GPIO line to supply
the ethernet chip.

Based on original code from Rajendra.
Signed-off-by: Benoit Cousson <b-cousson@ti.com>
Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Acked-by: Rob Herring <rob.herring@calxeda.com>

arch/arm/boot/dts/omap4-sdp.dts

@@ -17,6 +17,16 @@ memory {
 		device_type = "memory";
 		reg = <0x80000000 0x40000000>; /* 1 GB */
 	};
+
+	vdd_eth: fixedregulator@0 {
+		compatible = "regulator-fixed";
+		regulator-name = "VDD_ETH";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		gpio = <&gpio2 16 0>;  /* gpio line 48 */
+		enable-active-high;
+		regulator-boot-on;
+	};
 };
 
 &i2c1 {
@@ -70,3 +80,14 @@ hmc5843@1e {
 		reg = <0x1e>;
 	};
 };
+
+&mcspi1 {
+	eth@0 {
+		compatible = "ks8851";
+		spi-max-frequency = <24000000>;
+		reg = <0>;
+		interrupt-parent = <&gpio2>;
+		interrupts = <2>; /* gpio line 34 */
+		vdd-supply = <&vdd_eth>;
+	};
+};