soc/intel/{skl,cnl}: drop duplicate PM ACPI timer disabling

FSP already disables the PM ACPI timer, when EnableTcoTimer=0.

Test: clevo/l140cu and supermicro/x11ssm-f have the PM ACPI timer
disable bit set when EnableTcoTimer=0.

Change-Id: If370d3acf87ae6d1d7c64bf27228877cdd92ab2d
Signed-off-by: Michael Niewöhner <foss@mniewoehner.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/45954
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>

src/soc/intel/skylake/Kconfig

@@ -43,7 +43,6 @@ config CPU_SPECIFIC_OPTIONS
 	select REG_SCRIPT
 	select SA_ENABLE_DPR
 	select PMC_GLOBAL_RESET_ENABLE_LOCK
-	select PMC_LOW_POWER_MODE_PROGRAM
 	select SOC_INTEL_COMMON
 	select SOC_INTEL_COMMON_ACPI_WAKE_SOURCE
 	select SOC_INTEL_COMMON_BLOCK

src/soc/intel/skylake/finalize.c

@@ -62,16 +62,6 @@ static void pch_finalize_script(struct device *dev)
 	 */
 	pch_thermal_configuration();
 
-	/*
-	 * Disable ACPI PM timer based on dt policy
-	 *
-	 * Disabling ACPI PM timer is necessary for XTAL OSC shutdown.
-	 * Disabling ACPI PM timer also switches off TCO
-	 */
-
-	if (config->PmTimerDisabled)
-		pmc_disable_acpi_timer();
-
 	/* we should disable Heci1 based on the devicetree policy */
 	if (config->HeciEnabled == 0)
 		pch_disable_heci();