drm/amd/powerplay: Fix maybe-uninitialized in get_ppfeature_status

This fixes the warning below

error: ‘feature_mask’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
  *features_enabled = ((((uint64_t)feature_mask[0] << SMU_FEATURES_LOW_SHIFT) & SMU_FEATURES_LOW_MASK) |
                      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^
    (((uint64_t)feature_mask[1] << SMU_FEATURES_HIGH_SHIFT) & SMU_FEATURES_HIGH_MASK));
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -2377,7 +2377,7 @@ static int vega20_odn_edit_dpm_table(struct smu_context *smu,
 static int vega20_get_enabled_smc_features(struct smu_context *smu,
 		uint64_t *features_enabled)
 {
-	uint32_t feature_mask[2];
+	uint32_t feature_mask[2] = {0, 0};
 	int ret = 0;
 
 	ret = smu_feature_get_enabled_mask(smu, feature_mask, 2);