soc/intel: implement ACPI timer disabling per SoC and drop common code

Since it's just a one-liner, implement disabling of the ACPI timer in
soc code. This reduces complexity.

Change-Id: I434ea87d00f6e919983d9229f79d4adb352fbf27
Signed-off-by: Michael Niewöhner <foss@mniewoehner.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/58020
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
diff --git a/src/soc/intel/jasperlake/pmc.c b/src/soc/intel/jasperlake/pmc.c
index d3607dc..47c3bb1 100644
--- a/src/soc/intel/jasperlake/pmc.c
+++ b/src/soc/intel/jasperlake/pmc.c
@@ -100,7 +100,7 @@
 	 * Disabling ACPI PM timer also switches off TCO
 	 */
 	if (!CONFIG(USE_PM_ACPI_TIMER))
-		pmc_disable_acpi_timer();
+		setbits8(pmc_mmio_regs() + PCH_PWRM_ACPI_TMR_CTL, ACPI_TIM_DIS);
 }
 
 static void pm1_enable_pwrbtn_smi(void *unused)