amdkfd - misc fixes + get_local_mem_info() port [V.2]

[Edward O'Callaghan]

The following series applies on top of either master or the drm-next-4.9
branch. Apart from the couple of misc fixes here we port out the
'get_local_mem_info()' helper out of the ROCm kernel patch mountain
and hook that up so to be mainlined.

Please review,

Edward O'Callaghan (7):

  [PATCH 1/7] amdkfd: Tidy up kfd_generate_gpu_id() uint64_t bitshift
  [PATCH 2/7] radeonkfd/amdkfd: Implement get_local_mem_info()
  [PATCH 3/7] amdkfd: Add some missing memset zero'ing in queue init
  [PATCH 4/7] drm/amdkfd: Make kfd_lookup_process_by_pasid() well
  [PATCH 5/7] drm/amdkfd: Remove duplicate pqm_uninit()
  [PATCH 6/7] drm/amdkfd: Reuse function to find a process through
  [PATCH 7/7] drm/amdkfd: Fix possible infinite loop