drm/amd/pm: correct the way for retrieving current fclk frequency

Instead of using AverageFclkFrequencyPostDs/AverageFclkFrequencyPreDs,
we turn to target clock frequency(CurrClock[PPCLK_FCLK]).
Signed-off-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Likun Gao <Likun.Gao@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_0_ppt.c

@@ -852,7 +852,7 @@ static int smu_v13_0_0_get_current_clk_freq_by_table(struct smu_context *smu,
 		member_type = METRICS_CURR_UCLK;
 		break;
 	case PPCLK_FCLK:
-		member_type = METRICS_AVERAGE_FCLK;
+		member_type = METRICS_CURR_FCLK;
 		break;
 	case PPCLK_SOCCLK:
 		member_type = METRICS_CURR_SOCCLK;