drm/amdgpu: Add an extra evict_resource call during device_suspend.

- evict_resource is taking too long causing sriov full access mode timeout.
  So, add an extra evict_resource in the beginning as an early evict.

Signed-off-by: Shikang Fan <shikang.fan@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>