drm/i915/cnl: Cannonlake has same MOCS table than Skylake.

All registers and default configuration are the same for Skylake
and Cannonlake.

v2: Don't apply Wa for platforms without MOCS. (Paulo)

v3: Removed WaDisableSkipCaching that Joonas noticed that
according to spec it is not applicable to CNL.

Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1496781040-20888-8-git-send-email-rodrigo.vivi@intel.com