soc/intel/adl: Set slp-s0 counter frequency

System sleep time (SLP_S0 signal asserted) is measured in ticks, for
Alder Lake soc in 122us (i.e. ~8197Hz) granularity/ticks.

BUG=b:301854636
TEST=/sys/devices/system/cpu/cpuidle/
low_power_idle_system_residency_us" will show system idle residency time

Change-Id: I449f7ed0d9ef891ae5266e8fd784a063a75e38eb
Signed-off-by: Marx Wang <marx.wang@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/80665
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Sukumar Ghorai <sukumar.ghorai@intel.com>
Reviewed-by: Kapil Porwal <kapilporwal@google.com>
Reviewed-by: Subrata Banik <subratabanik@google.com>

src/soc/intel/alderlake/Kconfig

@@ -549,4 +549,9 @@ config HSPHY_FW_MAX_SIZE
 config HAVE_BMP_LOGO_COMPRESS_LZMA
 	default n
 
+config SOC_INTEL_COMMON_BLOCK_ACPI_SLP_S0_FREQ_HZ
+	default 0x2005
+	help
+	  slp_s0_residency granularity in 122us ticks (i.e. ~8.2KHz).
+
 endif