soc/intel: Fix ACPI device operations initialization

Initialize ACPI device operations only when CONFIG_HAVE_ACPI_TABLES is
enabled.

BUG=None
TEST=Build Test

Change-Id: I5c5266885d8b08338d17a87bb95110765882120e
Signed-off-by: Karthikeyan Ramasubramanian <kramasub@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/38309
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>

src/soc/intel/tigerlake/chip.c

@@ -156,7 +156,9 @@ static struct device_operations cpu_bus_ops = {
 	.set_resources    = DEVICE_NOOP,
 	.enable_resources = DEVICE_NOOP,
 	.init             = DEVICE_NOOP,
+#if CONFIG(HAVE_ACPI_TABLES)
 	.acpi_fill_ssdt_generator = generate_cpu_entries,
+#endif
 };
 
 static void soc_enable(struct device *dev)