cpufreq/amd-pstate: Drop cached epp_policy variable

epp_policy is not used by any of the current code and there
is no need to cache it.

Reviewed-by: Gautham R. Shenoy <gautham.shenoy@amd.com>
Link: https://lore.kernel.org/r/20241209185248.16301-6-mario.limonciello@amd.com
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>

Author: superm1

drivers/cpufreq/amd-pstate.c

@@ -1478,7 +1478,6 @@ static int amd_pstate_epp_cpu_init(struct cpufreq_policy *policy)
 		return -ENOMEM;
 
 	cpudata->cpu = policy->cpu;
-	cpudata->epp_policy = 0;
 
 	ret = amd_pstate_init_perf(cpudata);
 	if (ret)
@@ -1585,8 +1584,6 @@ static int amd_pstate_epp_update_limit(struct cpufreq_policy *policy)
 	value &= ~AMD_CPPC_DES_PERF(~0L);
 	value |= AMD_CPPC_DES_PERF(0);
 
-	cpudata->epp_policy = cpudata->policy;
-
 	/* Get BIOS pre-defined epp value */
 	epp = amd_pstate_get_epp(cpudata, value);
 	if (epp < 0) {

drivers/cpufreq/amd-pstate.h

@@ -57,7 +57,6 @@ struct amd_aperf_mperf {
  * @hw_prefcore: check whether HW supports preferred core featue.
  * 		  Only when hw_prefcore and early prefcore param are true,
  * 		  AMD P-State driver supports preferred core featue.
- * @epp_policy: Last saved policy used to set energy-performance preference
  * @epp_cached: Cached CPPC energy-performance preference value
  * @policy: Cpufreq policy value
  * @cppc_cap1_cached Cached MSR_AMD_CPPC_CAP1 register value
@@ -94,7 +93,6 @@ struct amd_cpudata {
 	bool	hw_prefcore;
 
 	/* EPP feature related attributes*/
-	s16	epp_policy;
 	s16	epp_cached;
 	u32	policy;
 	u64	cppc_cap1_cached;