drm/i915: Add debugfs knobs for VLVCHV memory latency values
drm/i915: Add debugfs knobs for VLVCHV memory latency values

Allow tweaking the VLV/CHV memory latencies thorugh sysfs, like we do
for ILK+.

Signed-off-by: Ville Syrjälä <cd6e8d405ca90be3a03d5427c5b24fbd2d68dcc4@linux.intel.com>
Reviewed-by: Clint Taylor <bc6c9a131f883e300edb6463e7bd7e253fd2706b@intel.com>
Signed-off-by: Daniel Vetter <c1b6782c4af8f0673da8923a0702a1832e5940f4@ffwll.ch>

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