drm/amd/pm: fix a potential gpu_metrics_table memory leak

gpu_metrics_table is allocated in yellow_carp_init_smc_tables() but
not freed in yellow_carp_fini_smc_tables().
Signed-off-by: Gong Yuanjun <ruc_gongyuanjun@163.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -190,6 +190,9 @@ static int yellow_carp_fini_smc_tables(struct smu_context *smu)
 	kfree(smu_table->watermarks_table);
 	smu_table->watermarks_table = NULL;
 
+	kfree(smu_table->gpu_metrics_table);
+	smu_table->gpu_metrics_table = NULL;
+
 	return 0;
 }