x86: Add post failure codes for bist and car

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

arch/x86/cpu/ivybridge/cpu.c

@@ -263,6 +263,7 @@ static void enable_usb_bar(void)
 static int report_bist_failure(void)
 {
 	if (gd->arch.bist != 0) {
+		post_code(POST_BIST_FAILURE);
 		printf("BIST failed: %08x\n", gd->arch.bist);
 		return -EFAULT;
 	}

arch/x86/include/asm/post.h

@@ -33,6 +33,8 @@
 #define POST_LAPIC		0x30
 
 #define POST_RAM_FAILURE	0xea
+#define POST_BIST_FAILURE	0xeb
+#define POST_CAR_FAILURE	0xec
 
 /* Output a post code using al - value must be 0 to 0xff */
 #ifdef __ASSEMBLY__