x86: acpi: Add common Intel ACPI tables

Add various tables that are common to Intel CPUs. These functions can be
used by arch-specific CPU code.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/x86/cpu/intel_common/Makefile b/arch/x86/cpu/intel_common/Makefile
index f1d1513..4a5cf17 100644
--- a/arch/x86/cpu/intel_common/Makefile
+++ b/arch/x86/cpu/intel_common/Makefile
@@ -2,6 +2,8 @@
 #
 # Copyright (c) 2016 Google, Inc
 
+obj-$(CONFIG_INTEL_ACPIGEN) += acpi.o
+
 ifdef CONFIG_HAVE_MRC
 obj-$(CONFIG_$(SPL_TPL_)X86_16BIT_INIT) += car.o
 obj-$(CONFIG_$(SPL_TPL_)X86_32BIT_INIT) += me_status.o