soc/intel/common/timer: Move USE_LEGACY_8254_TIMER into common/block/timer

This patch moves USE_LEGACY_8254_TIMER Kconfig into common/block/timer
for better code sharing. Also ported CB:33512 for SPT and ICP PCH.

Change-Id: Ic767ff97aaa3eb7fa35ffa38fa416d006eaa6e78
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34132
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>

src/soc/intel/skylake/chip.c

@@ -237,6 +237,9 @@ void soc_silicon_init_params(SILICON_INIT_UPD *params)
 	params->SlowSlewRateForSa = config->SlowSlewRateForSa;
 	params->FastPkgCRampDisable = config->FastPkgCRampDisable;
 
+	/* Legacy 8254 timer support */
+	params->Early8254ClockGatingEnable = !CONFIG_USE_LEGACY_8254_TIMER;
+
 	soc_irq_settings(params);
 }