intel/isl: Allow stencil buffer to support compression on Gen12+

v2: (Nanley Chery)
- Fix commit title
- Fix comment

Signed-off-by: Sagar Ghuge <sagar.ghuge@intel.com>
Reviewed-by: Nanley Chery <nanley.g.chery@intel.com>
50 jobs for !2344 with stencil_ccs in 30 minutes and 43 seconds (queued for 6 seconds)
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