drm/amd/powerplay: return current DCEFCLK on sysfs read (v2)

This fixes incorrect output when reading pp_dpm_dcefclk sysfs.

Output before this patch:
cat /sys/devices/pci0000:<snip>/pp_dpm_dcefclk
0: 506Mhz
1: 42949671Mhz *
2: 1266Mhz

v2: squash in arcturus fix

Signed-off-by: Nirmoy Das <nirmoy.das@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/powerplay/navi10_ppt.c

@@ -613,6 +613,9 @@ static int navi10_get_smu_metrics_data(struct smu_context *smu,
 	case METRICS_CURR_DCLK:
 		*value = metrics->CurrClock[PPCLK_DCLK];
 		break;
+	case METRICS_CURR_DCEFCLK:
+		*value = metrics->CurrClock[PPCLK_DCEFCLK];
+		break;
 	case METRICS_AVERAGE_GFXCLK:
 		*value = metrics->AverageGfxclkFrequency;
 		break;

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

@@ -605,6 +605,9 @@ static int sienna_cichlid_get_smu_metrics_data(struct smu_context *smu,
 	case METRICS_CURR_DCLK1:
 		*value = metrics->CurrClock[PPCLK_DCLK_1];
 		break;
+	case METRICS_CURR_DCEFCLK:
+		*value = metrics->CurrClock[PPCLK_DCEFCLK];
+		break;
 	case METRICS_AVERAGE_GFXCLK:
 		*value = metrics->AverageGfxclkFrequency;
 		break;