imx6q-lxr: Convert to OF_UPSTREAM

The imx6q-lxr devicetree has landed in kernel 6.13.

Switch to OF_UPSTREAM to make use of the upstream devicetree.

Signed-off-by: Fabio Estevam <festevam@denx.de>
diff --git a/arch/arm/mach-imx/mx6/Kconfig b/arch/arm/mach-imx/mx6/Kconfig
index 4020e16..2f873ed 100644
--- a/arch/arm/mach-imx/mx6/Kconfig
+++ b/arch/arm/mach-imx/mx6/Kconfig
@@ -550,6 +550,7 @@
 	select DM_THERMAL
 	select SUPPORT_SPL
 	imply CMD_DM
+	imply OF_UPSTREAM
 
 config TARGET_PCM058
 	bool "Phytec PCM058 i.MX6 Quad"