drm/amd/powerplay: fix amdgpu_pm_info show gpu load error

due to the smu dma/RTOS restriction, the interval of catching smu
metric table should be more than 1ms. otherwise it will cause the gpu
activity data corruption.
Signed-off-by: Kevin Wang <kevin1.wang@amd.com>
Reviewed-by: Kenneth Feng <kenneth.feng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -816,6 +816,8 @@ static int navi10_get_current_activity_percent(struct smu_context *smu,
 	if (!value)
 		return -EINVAL;
 
+	msleep(1);
+
 	ret = smu_update_table(smu, SMU_TABLE_SMU_METRICS,
 			       (void *)&metrics, false);
 	if (ret)