ARM: dts: k2e: Enable Davinci SPI controller

Now that davinci_spi driver has been converted to DM framework, enable
the same in DT. Also add "spi-flash" as compatible property to
n25q128a11 node as it is required for flash device to be probed in
U-Boot.

Signed-off-by: Vignesh R <vigneshr@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Jagan Teki <jteki@openedev.com>

arch/arm/dts/k2e-evm.dts

@@ -119,10 +119,11 @@
 };
 
 &spi0 {
+	status = "okay";
 	nor_flash: n25q128a11@0 {
 		#address-cells = <1>;
 		#size-cells = <1>;
-		compatible = "Micron,n25q128a11";
+		compatible = "Micron,n25q128a11", "spi-flash";
 		spi-max-frequency = <54000000>;
 		m25p,fast-read;
 		reg = <0>;