drm/amdgpu: fix buffer placement under memory pressure

Some buffers (UVD/VM page tables) must be placed in VRAM,
but the byte restriction for moving buffers didn't took this
into account.

Port of radeon commit 4b09556660bfe1b43d72ca858524c6baf2c6cb1d.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Jammy Zhou <Jammy.Zhou@amd.com>
1 file changed