amdgpu: use the high VA range if possible v2

Retire the low range on Vega10 this frees up everything below 0xffff800000000000 for HMM.

v2: keep the 32bit range working.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
1 file changed