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>

arch/x86/cpu/coreboot/coreboot.c

@@ -99,3 +99,8 @@ void panic_puts(const char *str)
 	while (*str)
 		NS16550_putc(port, *str++);
 }
+
+int misc_init_r(void)
+{
+	return 0;
+}

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