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/am57xx-beagle-x15-common.dtsi b/arch/arm/dts/am57xx-beagle-x15-common.dtsi
index d6b94d5..1912ea9 100644
--- a/arch/arm/dts/am57xx-beagle-x15-common.dtsi
+++ b/arch/arm/dts/am57xx-beagle-x15-common.dtsi
@@ -528,13 +528,13 @@
 };
 
 &dss {
-	status = "ok";
+	status = "okay";
 
 	vdda_video-supply = <&ldoln_reg>;
 };
 
 &hdmi {
-	status = "ok";
+	status = "okay";
 	vdda-supply = <&ldo4_reg>;
 
 	port {
@@ -545,7 +545,7 @@
 };
 
 &pcie1_rc {
-	status = "ok";
+	status = "okay";
 	gpios = <&gpio2 8 GPIO_ACTIVE_LOW>;
 };