minigbm: Support bo_create_with_modifiers in the dumb driver

Allow only the linear format modifier.

TEST=Boot reven Macbook 7,1 with modifiers-enabled kernel. See that UI
     comes up.

Change-Id: Icc13fa93677fc364e7de79c1e54a743defc6bc96
Tested-by: Matt Turner <>
Reviewed-by: Yiwei Zhang <>
Reviewed-by: Chad Versace <>
Reviewed-by: Matt Turner <>
Commit-Queue: Matt Turner <>
Auto-Submit: Matt Turner <>
1 file changed