imx: imx93-11x11-evk: convert to OF_UPSTREAM

Convert to OF_UPSTREAM for i.MX93 11x11 EVK.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
diff --git a/arch/arm/mach-imx/imx9/Kconfig b/arch/arm/mach-imx/imx9/Kconfig
index b79485f..e892da8 100644
--- a/arch/arm/mach-imx/imx9/Kconfig
+++ b/arch/arm/mach-imx/imx9/Kconfig
@@ -31,6 +31,7 @@
 config TARGET_IMX93_11X11_EVK
 	bool "imx93_11x11_evk"
 	select IMX93
+	imply OF_UPSTREAM
 
 config TARGET_IMX93_VAR_SOM
 	bool "imx93_var_som"