soc/intel/alderlake: Enable CPPCv3

The patch defines the following helper functions:

get_cpu_scaling_factor(): Returns scaling factors of big and small core.

cpu_is_nominal_freq_supported(): Returns true if CPU supports Nominal
Frequency, otherwise false.

cpu_is_nominal_freq_supported(): Check CPU supports nominal frequency or
not.

The patch also enables CPPCv3 support for Intel Alder Lake which is
based on hybrid core architecture.

TEST=Verified Nominal Frequency and Nominal Performance are getting
updated for ADL-P small and big cores correctly.

Signed-off-by: Sridahr Siricilla <sridhar.siricilla@intel.com>
Change-Id: I963690a4fadad322095d202bcc08c92dcd845360
Reviewed-on: https://review.coreboot.org/c/coreboot/+/59362
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>

src/soc/intel/alderlake/Kconfig

@@ -63,6 +63,7 @@ config CPU_SPECIFIC_OPTIONS
 	select SOC_INTEL_COMMON_BLOCK
 	select SOC_INTEL_COMMON_BLOCK_ACPI
 	select SOC_INTEL_COMMON_BLOCK_ACPI_CPPC
+	select SOC_INTEL_COMMON_BLOCK_ACPI_CPU_HYBRID
 	select SOC_INTEL_COMMON_BLOCK_ACPI_GPIO
 	select SOC_INTEL_COMMON_BLOCK_ACPI_PEP
 	select SOC_INTEL_COMMON_BLOCK_ACPI_PEP_LPM_REQ

src/soc/intel/alderlake/cpu.c

@@ -90,6 +90,17 @@ enum core_type get_soc_cpu_type(void)
 		return CPUID_CORE_TYPE_INTEL_CORE;
 }
 
+void soc_get_scaling_factor(u16 *big_core_scal_factor, u16 *small_core_scal_factor)
+{
+	*big_core_scal_factor = 127;
+	*small_core_scal_factor = 100;
+}
+
+bool soc_is_nominal_freq_supported(void)
+{
+	return true;
+}
+
 /* All CPUs including BSP will run the following function. */
 void soc_core_init(struct device *cpu)
 {