dts: xea: Disable 'clks' node for xea (imx287)

As imx28 family of SoCs is NOT supporting the Common Clock Framework (CCF)
the 'clks' property shall NOT be enabled by default.

Without this change u-boot proper before relocation tries to bind driver
(which doesn't exists) for this device. As a result, pre-relocation DTB
parsing is finished with error and the board hangs in a very early stage
of u-boot proper boot process.

Signed-off-by: Lukasz Majewski <lukma@denx.de>
diff --git a/arch/arm/dts/imx28-xea-u-boot.dtsi b/arch/arm/dts/imx28-xea-u-boot.dtsi
index 52fec31..bdbeca5 100644
--- a/arch/arm/dts/imx28-xea-u-boot.dtsi
+++ b/arch/arm/dts/imx28-xea-u-boot.dtsi
@@ -32,6 +32,7 @@
 
 &clks {
 	bootph-pre-ram;
+	status = "disable";
 };
 
 &duart {