drm/i915/dg2: Tile 4 plane format support

Tile4 in bspec format is 4K tile organized into
64B subtiles with same basic shape as for legacy TileY
which will be supported by Display13.

v2: - Moved Tile4 associating struct for modifier/display to
      the beginning(Imre Deak)
    - Removed unneeded case I915_FORMAT_MOD_4_TILED modifier
      checks(Imre Deak)
    - Fixed I915_FORMAT_MOD_4_TILED to be 9 instead of 12
      (Imre Deak)

v3: - Rebased patch on top of new changes related to plane_caps.
    - Added static assert to check that PLANE_CTL_TILING_YF
      matches PLANE_CTL_TILING_4(Nanley Chery)
    - Fixed naming and layout description for Tile 4 in drm uapi
      header(Nanley Chery)

v4: - Extracted drm_fourcc changes to separate patch(Nanley Chery)

Reviewed-by: Imre Deak <[email protected]>
Cc: Matt Roper <[email protected]>
Cc: Maarten Lankhorst <[email protected]>
Signed-off-by: Stanislav Lisovskiy <[email protected]>
Signed-off-by: Matt Roper <[email protected]>
Signed-off-by: Juha-Pekka Heikkilä <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]

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