Fix HaikuBuildCompatibility to not define atmics anymore.

This reverts commit 34dbbb65fdfa4a70cd2c472731bb71b16385e29f.
Instead, we can remove thos from HaikuBuildCompatibility and things will work fine, unless one try t build Haiku on BeOS (this isn't
supported anymore) or a very old Haiku which esdon't have those.
Add support for my Core i3 integrated graphics.