drm/amdgpu: drop extra drm_kms_helper_poll_enable/disable calls

These are already called in amdgpu_device_suspend/resume which
are already called in the same functions.
Acked-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_device.c

@@ -1445,10 +1445,8 @@ static void amdgpu_switcheroo_set_state(struct pci_dev *pdev,
 		amdgpu_device_resume(dev, true);
 
 		dev->switch_power_state = DRM_SWITCH_POWER_ON;
-		drm_kms_helper_poll_enable(dev);
 	} else {
 		pr_info("switched off\n");
-		drm_kms_helper_poll_disable(dev);
 		dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
 		amdgpu_device_suspend(dev, true);
 		amdgpu_device_cache_pci_state(pdev);

drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c

@@ -1348,7 +1348,6 @@ static int amdgpu_pmops_runtime_suspend(struct device *dev)
 	adev->in_runpm = true;
 	if (amdgpu_device_supports_atpx(drm_dev))
 		drm_dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
-	drm_kms_helper_poll_disable(drm_dev);
 
 	ret = amdgpu_device_suspend(drm_dev, false);
 	if (ret)
@@ -1405,7 +1404,6 @@ static int amdgpu_pmops_runtime_resume(struct device *dev)
 		amdgpu_device_baco_exit(drm_dev);
 	}
 	ret = amdgpu_device_resume(drm_dev, false);
-	drm_kms_helper_poll_enable(drm_dev);
 	if (amdgpu_device_supports_atpx(drm_dev))
 		drm_dev->switch_power_state = DRM_SWITCH_POWER_ON;
 	adev->in_runpm = false;