drm/i915: Replace hardcoded cacheline size with macro
drm/i915: Replace hardcoded cacheline size with macro

For readibility and guess at the meaning behind the constants.

v2: Claim only the meagerest connections with reality.

Signed-off-by: Chris Wilson <711c73f64afdce07b7e38039a96d2224209e9a6c@chris-wilson.co.uk>
Reviewed-by: Oscar Mateo <8d158a6e9567f59e489595fde938b03d223fe815@intel.com>
Signed-off-by: Daniel Vetter <c1b6782c4af8f0673da8923a0702a1832e5940f4@ffwll.ch>

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