drm/amdgpu: Fix GFX v9.4.3 EOP buffer allocation

Each compute cluster gets 8 compute queues in GFX v9.4.3. Fix the EOP
buffer allocation so that compute queue on every XCC gets a unique
address.

Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Tested-and-Reviewed-by: Asad Kamal <asad.kamal@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>