Misc DAL & amdkfd cleanups on top of drm-next-4.7-wip-dal

[Edward O'Callaghan]

The following series applies on top of the 'drm-next-4.7-wip-dal'
branch. One patch has already been reviewed, however I have included
it again here for completeness. The is the first of, I hope, further
work from me in helping the mainlining of DAL and improving amdkfd
compute to work out the box for us HPC folks. Please review.

Thanks for your time,

Edward O'Callaghan (9):
  amdgpu/dal: Kill off stale dal directories
  amdgpu/dal: Kill off stub amdgpu_dm_*_dal_lock() symbols
  amdgpu/dal: Kill off stub dal_isr_*_lock() symbols
  amdgpu/dal: Use the canonical form in branch predicates
  amdgpu/dal: Use true/false over integers for boolean vars
  amdgpu/dal: Drop spurious double ';' at the end of lines
  amdkfd: Use the canonical form in branch predicates
  amdkfd: Trim off unnescessary semicolon from
  amdkfd: Trim unnescessary intermediate err var in