x86: acpi: Add PCT and PTC tables

These are needed for the CPU tables. Add them into an x86-specific file
since we do not support them on sandbox, or include tests.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/x86/lib/Makefile b/arch/x86/lib/Makefile
index 1185a88..f04d275 100644
--- a/arch/x86/lib/Makefile
+++ b/arch/x86/lib/Makefile
@@ -38,7 +38,7 @@
 obj-y	+= acpi.o
 obj-$(CONFIG_HAVE_ACPI_RESUME) += acpi_s3.o
 ifndef CONFIG_QEMU
-obj-$(CONFIG_GENERATE_ACPI_TABLE) += acpi_table.o
+obj-$(CONFIG_GENERATE_ACPI_TABLE) += acpi_table.o acpigen.o
 endif
 obj-y	+= tables.o
 ifndef CONFIG_SPL_BUILD