drm/amdgpu/dce_virtual: Enable vBlank control for vf

This function actually control the vblank on/off.
It shouldn't be bypassed for VF. Otherwise all the
vblank based feature on VF will not work.

Signed-off-by: shaoyunl <shaoyun.liu@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -139,9 +139,6 @@ static void dce_virtual_crtc_dpms(struct drm_crtc *crtc, int mode)
 	struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
 	unsigned type;
 
-	if (amdgpu_sriov_vf(adev))
-		return;
-
 	switch (mode) {
 	case DRM_MODE_DPMS_ON:
 		amdgpu_crtc->enabled = true;