drm/amdgpu: Set PTE_IS_PTE bit for gfx12

Set PTE_IS_PTE bit while PRT is enabled on gfx12.
Signed-off-by: Frank Min <Frank.Min@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/gmc_v12_0.c

@@ -516,6 +516,7 @@ static void gmc_v12_0_get_vm_pte(struct amdgpu_device *adev,
 		*flags |= AMDGPU_PTE_PRT_GFX12;
 		*flags |= AMDGPU_PTE_SNOOPED;
 		*flags |= AMDGPU_PTE_SYSTEM;
+		*flags |= AMDGPU_PTE_IS_PTE;
 		*flags &= ~AMDGPU_PTE_VALID;
 	}