drm/amd/amdgpu: post card if there is real hw resetting performed

Check whether we need to post rather than whether the asic is
posted.  There are some cases (e.g., GPU reset or resume from
hibernate) where we need to force post even if the asic has
been posted.

Signed-off-by: Jim Qu <Jim.Qu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>