soc/intel/block/pmclib.c: Properly guard apm_control()

This function is only properly implemented with SMM support.

Change-Id: I9e0fc7433a9226825f5ae4903c0ff2e0162d86ac
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/47757
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/soc/intel/common/block/pmc/pmclib.c

@@ -713,7 +713,7 @@ void pmc_disable_acpi_timer(void)
 
 void pmc_set_acpi_mode(void)
 {
-	if (!acpi_is_wakeup_s3()) {
+	if (!CONFIG(NO_SMM) && !acpi_is_wakeup_s3()) {
 		apm_control(APM_CNT_ACPI_DISABLE);
 	}
 }