drm/amdgpu: GFX12.1 scratch memory limit up to 57-bit

drm/amdgpu: GFX12.1 scratch memory limit up to 57-bit

The scratch aperture or gmc private aperture in flat memory contains
57 bits of data on gfx v12.1.0 compared to the 32 bits from previous.

Add new helper kfd_init_apertures_v12 for gfx version >= v12.1.0 which
supports 57-bit VA space.

v2:
  - update pdd->scratch_limit (Yu, Lang)
  - update fixes tag (Felix Kuehling)
  - add helper kfd_init_apertures_v12

Fixes: db1882b3ff0c ("drm/amdkfd: Update LDS, Scratch base for 57bit address")
Signed-off-by: Philip Yang <Philip.Yang@amd.com>
Reviewed-by: Lang Yu <lang.yu@amd.com>
Acked-by: Felix Kuehling <felix.kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>