acpi: Use finer-grained control of ACPI-table generation

Rather than keying everything off ACPIGEN, use the main
GENERATE_ACPI_TABLE option to determine whether the core ACPI code
is included. Make sure these option are not enabled in SPL/TPL since we
never generate tables there.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/Kconfig b/arch/Kconfig
index c5dd7fc..bea8ead 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -203,6 +203,7 @@
 	imply CMD_EXTENSION
 	imply KEYBOARD
 	imply PHYSMEM
+	imply GENERATE_ACPI_TABLE
 
 config SH
 	bool "SuperH architecture"
diff --git a/arch/x86/lib/Makefile b/arch/x86/lib/Makefile
index e5235b7..a6f2244 100644
--- a/arch/x86/lib/Makefile
+++ b/arch/x86/lib/Makefile
@@ -41,7 +41,7 @@
 obj-$(CONFIG_HAVE_ACPI_RESUME) += acpi_s3.o
 ifndef CONFIG_QEMU
 obj-y += acpigen.o
-obj-$(CONFIG_GENERATE_ACPI_TABLE) += acpi_table.o
+obj-$(CONFIG_$(SPL_TPL_)GENERATE_ACPI_TABLE) += acpi_table.o
 endif
 obj-y	+= tables.o
 ifndef CONFIG_SPL_BUILD