x86: Add LAPIC setup code

Add code to set up the Local Advanced Peripheral Interrupt Controller.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/arch/x86/include/asm/post.h b/arch/x86/include/asm/post.h
index ce68839..6d2ae5d 100644
--- a/arch/x86/include/asm/post.h
+++ b/arch/x86/include/asm/post.h
@@ -30,6 +30,7 @@
 #define POST_PRE_MRC		0x2e
 #define POST_MRC		0x2f
 #define POST_DRAM		0x2f
+#define POST_LAPIC		0x30
 
 #define POST_RAM_FAILURE	0xea