x86: link: Add a text base for 64-bit U-Boot

Set up the 64-bit U-Boot text base if building for that target.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/board/google/chromebook_link/Kconfig b/board/google/chromebook_link/Kconfig
index fa12f33..5c57945 100644
--- a/board/google/chromebook_link/Kconfig
+++ b/board/google/chromebook_link/Kconfig
@@ -13,7 +13,8 @@
 	default "chromebook_link"
 
 config SYS_TEXT_BASE
-	default 0xfff00000
+	default 0xfff00000 if !SUPPORT_SPL
+	default 0x10000000 if SUPPORT_SPL
 
 config BOARD_SPECIFIC_OPTIONS # dummy
 	def_bool y