drm/amdgpu: set snooped flags only on system addresses v2
drm/amdgpu: set snooped flags only on system addresses v2

Not necessary for VRAM.

v2: no need to check if ttm is NULL.

Signed-off-by: Christian König <c7ea837d7a46effe4232b086213468b8b31643bf@amd.com>
Signed-off-by: Alex Deucher <08dc22c6156113f2deff178e35e3ed9b24d6af9e@amd.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs