compositor-drm: Use matrix type to test for drm plane compatibility
compositor-drm: Use matrix type to test for drm plane compatibility

The drm planes (sprites) only support translation and scaling.  Now that
we have matrix.type, we can just look there to see if the transform is
compatible with kms.

jonnylamb/weston,Fantu/compositor-spice,kwm81/weston,krezovic/weston,Fantu/compositor-spice,Gnurou/weston,sir-murray/weston,kwm81/weston,mchalupa/weston,udoprog/weston,Tarnyko/weston-xdg_surface_present,sir-murray/weston,giucam/weston,jonnylamb/weston,Gnurou/weston,Fantu/compositor-spice,udoprog/weston,giucam/weston,krezovic/weston,Tarnyko/weston-xdg_surface_present,xorgy/weston,eyolfson/weston,mchalupa/weston,eyolfson/weston,xorgy/weston