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/cpu/Makefile b/arch/x86/cpu/Makefile
index 3839262..7f09db5 100644
--- a/arch/x86/cpu/Makefile
+++ b/arch/x86/cpu/Makefile
@@ -15,5 +15,6 @@
 obj-$(CONFIG_SYS_COREBOOT) += coreboot/
 obj-$(CONFIG_NORTHBRIDGE_INTEL_SANDYBRIDGE) += ivybridge/
 obj-$(CONFIG_NORTHBRIDGE_INTEL_IVYBRIDGE) += ivybridge/
+obj-y += lapic.o
 obj-$(CONFIG_PCI) += pci.o
 obj-y += turbo.o