x86: link: Set up device tree for SPL

Add the correct pre-relocation tag so that the required device tree nodes
are present in the SPL device tree.

On x86 it doesn't make a lot of sense to have a separate SPL device tree.
Since everything is in the same ROM we might as well just use the main
device tree in both SPL and U-Boot proper. But we haven't implemented that,
so this is a good first step.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/configs/chromebook_link_defconfig b/configs/chromebook_link_defconfig
index 1a79ab8..86852ad 100644
--- a/configs/chromebook_link_defconfig
+++ b/configs/chromebook_link_defconfig
@@ -1,5 +1,5 @@
 CONFIG_X86=y
-CONFIG_SYS_MALLOC_F_LEN=0x1800
+CONFIG_SYS_MALLOC_F_LEN=0x2000
 CONFIG_VENDOR_GOOGLE=y
 CONFIG_DEFAULT_DEVICE_TREE="chromebook_link"
 CONFIG_TARGET_CHROMEBOOK_LINK=y
@@ -61,8 +61,8 @@
 CONFIG_USB=y
 CONFIG_DM_USB=y
 CONFIG_USB_STORAGE=y
-CONFIG_USB_KEYBOARD=y
 CONFIG_DM_VIDEO=y
+CONFIG_USB_KEYBOARD=y
 CONFIG_VIDEO_VESA=y
 CONFIG_FRAMEBUFFER_SET_VESA_MODE=y
 CONFIG_FRAMEBUFFER_VESA_MODE_11A=y