drm/amdgpu: Fix an error message in rmmod

[why]
In rmmod procedure, kfd sends cp a dequeue request, but the
request does not get response, then an error message "cp
queue pipe 4 queue 0 preemption failed" printed.

[how]
Performing kfd suspending after disabling gfxoff can fix it.

Acked-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Yang Wang <kevinyang.wang@amd.com>
Signed-off-by: Tianci.Yin <tianci.yin@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -2721,11 +2721,11 @@ static int amdgpu_device_ip_fini_early(struct amdgpu_device *adev)
 		}
 	}
 
-	amdgpu_amdkfd_suspend(adev, false);
-
 	amdgpu_device_set_pg_state(adev, AMD_PG_STATE_UNGATE);
 	amdgpu_device_set_cg_state(adev, AMD_CG_STATE_UNGATE);
 
+	amdgpu_amdkfd_suspend(adev, false);
+
 	/* Workaroud for ASICs need to disable SMC first */
 	amdgpu_device_smu_fini_early(adev);