x86: Fix device-tree indentation

With the use of a phandle we can outdent the device tree nodes a little.
Fix this.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

arch/x86/dts/u-boot.dtsi

@@ -54,7 +54,6 @@
 	u-boot-spl-with-ucode-ptr {
 		offset = <CONFIG_SPL_TEXT_BASE>;
 	};
-
 	u-boot-dtb-with-ucode2 {
 		type = "u-boot-dtb-with-ucode";
 	};