x86: config: Enable hook for saving MRC configuration

Add a hook to ensure that this information is saved.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/include/configs/chromebook_link.h b/include/configs/chromebook_link.h
index 7e6d239..6e8b9ef 100644
--- a/include/configs/chromebook_link.h
+++ b/include/configs/chromebook_link.h
@@ -20,6 +20,7 @@
 
 #define CONFIG_DCACHE_RAM_MRC_VAR_SIZE		0x4000
 #define CONFIG_BOARD_EARLY_INIT_F
+#define CONFIG_MISC_INIT_R
 
 #define CONFIG_NR_DRAM_BANKS			8
 #define CONFIG_X86_MRC_ADDR			0xfffa0000