drm/amdgpu: Fix logic to determine TOS reload

Avoid comparing TOS version on APUs. On APUs driver doesn't take care of
TOS load.

Fixes: 0ff38226 ("drm/amdgpu: Add interface for TOS reload cases")
Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Acked-by: Rajneesh Bhardwaj <Rajneesh.bhardwaj@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>