ARM: dts: Fix node status to "okay" on TI boards

As per Device Tree Specification [1], the status parameter of nodes can
be "okay", "disabled", etc. "ok" is not a valid parameter.

U-boot Driver Model does not recognize status="ok" either and treats
the node as disabled.

[1] https://github.com/devicetree-org/devicetree-specification/releases/tag/v0.3

Signed-off-by: Roger Quadros <rogerq@kernel.org>
Reviewed-by: Nishanth Menon <nm@ti.com>
diff --git a/arch/arm/dts/keystone-k2hk-evm.dts b/arch/arm/dts/keystone-k2hk-evm.dts
index 84c58d7..acfcaff 100644
--- a/arch/arm/dts/keystone-k2hk-evm.dts
+++ b/arch/arm/dts/keystone-k2hk-evm.dts
@@ -170,7 +170,7 @@
 };
 
 &mdio {
-	status = "ok";
+	status = "okay";
 	ethphy0: ethernet-phy@0 {
 		compatible = "marvell,88E1111", "ethernet-phy-ieee802.3-c22";
 		reg = <0>;