soc/intel/xeon_sp: Rename cpx_generate_p_state_entries()

Prepare for common ACPI. Rename cpx_generated_p_state_entries()
to the common soc_power_states_generation() function. Add
empty soc_power_states_generation() to skx.

Change-Id: Ib7e8dfd2bb602f3e6ccdb5b221bc65236f66a875
Signed-off-by: Marc Jones <marcjones@sysproconsulting.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/46598
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
diff --git a/src/soc/intel/xeon_sp/cpx/soc_acpi.c b/src/soc/intel/xeon_sp/cpx/soc_acpi.c
index 19d196d..8820517 100644
--- a/src/soc/intel/xeon_sp/cpx/soc_acpi.c
+++ b/src/soc/intel/xeon_sp/cpx/soc_acpi.c
@@ -123,8 +123,8 @@
 	acpigen_pop_len();
 }
 
-/* To be renamed soc_power_states_generation() */
-void cpx_generate_p_state_entries(int core, int cores_per_package)
+/* TODO: See if we can use the common generate_p_state_entries */
+void soc_power_states_generation(int core, int cores_per_package)
 {
 	int ratio_min, ratio_max, ratio_turbo, ratio_step;
 	int coord_type, power_max, power_unit, num_entries;