drm/powerplay: Fix Vega20 Average Power value v4

The SMU changed reading from CurrSocketPower to AverageSocketPower, so
reflect this accordingly. This fixes the issue where Average Power
Consumption was being reported as 0 from SMU 40.46-onward

v2: Fixed headline prefix
v3: Add check for SMU version for proper compatibility
v4: Style fix
Signed-off-by: Kent Russell <kent.russell@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/powerplay/hwmgr/vega20_hwmgr.c

@@ -2101,7 +2101,10 @@ static int vega20_get_gpu_power(struct pp_hwmgr *hwmgr,
 	if (ret)
 		return ret;
 
+	if (hwmgr->smu_version < 0x282e00)
 		*query = metrics_table.CurrSocketPower << 8;
+	else
+		*query = metrics_table.AverageSocketPower << 8;
 
 	return ret;
 }

drivers/gpu/drm/amd/powerplay/vega20_ppt.c

@@ -2917,6 +2917,7 @@ static int vega20_get_fan_speed_percent(struct smu_context *smu,
 
 static int vega20_get_gpu_power(struct smu_context *smu, uint32_t *value)
 {
+	uint32_t smu_version;
 	int ret = 0;
 	SmuMetrics_t metrics;
 
@@ -2927,7 +2928,14 @@ static int vega20_get_gpu_power(struct smu_context *smu, uint32_t *value)
 	if (ret)
 		return ret;
 
+	ret = smu_get_smc_version(smu, NULL, &smu_version);
+	if (ret)
+		return ret;
+
+	if (smu_version < 0x282e00)
 		*value = metrics.CurrSocketPower << 8;
+	else
+		*value = metrics.AverageSocketPower << 8;
 
 	return 0;
 }