drm/amdgpu: update the vm invalidation engine layout V2

We need new invalidation engine layout due to new SDMA page
queues added.

V2: fix coding style and add correct return value

Signed-off-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Oak Zeng <Oak.Zeng@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>