drm/i915: Clean up aliasing ppgtt correctly on error paths
drm/i915: Clean up aliasing ppgtt correctly on error paths

While at it inline the free functions - they don't actually free the
ppgtt, just clean up the allocations done for it.

Reviewed-by: Mika Kuoppala <cd221c71e765d1ce593d15b204fee351fb09fd98@intel.com>
Signed-off-by: Daniel Vetter <c1b6782c4af8f0673da8923a0702a1832e5940f4@ffwll.ch>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs