Revert "drm/amdgpu: Disable gfx off if VCN is busy"

This reverts commit 3fded222
This is work around for vcn1 only. Currently vcn1 has separate
begin_use and idle work handle.
Signed-off-by: NJames Zhu <James.Zhu@amd.com>
Tested-by: Nchangzhu <Changfeng.Zhu@amd.com>
Reviewed-by: NAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

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

@@ -353,7 +353,6 @@ static void amdgpu_vcn_idle_work_handler(struct work_struct *work)
 	}
 
 	if (!fences && !atomic_read(&adev->vcn.total_submission_cnt)) {
-		amdgpu_gfx_off_ctrl(adev, true);
 		amdgpu_device_ip_set_powergating_state(adev, AMD_IP_BLOCK_TYPE_VCN,
 		       AMD_PG_STATE_GATE);
 	} else {
@@ -369,7 +368,6 @@ void amdgpu_vcn_ring_begin_use(struct amdgpu_ring *ring)
 	cancel_delayed_work_sync(&adev->vcn.idle_work);
 
 	mutex_lock(&adev->vcn.vcn_pg_lock);
-	amdgpu_gfx_off_ctrl(adev, false);
 	amdgpu_device_ip_set_powergating_state(adev, AMD_IP_BLOCK_TYPE_VCN,
 	       AMD_PG_STATE_UNGATE);