I dropped alpha from sci-libs/umfpack because it needs sci-libs/suitesparseconfig
Ans some more arches
cuda use flag should have be masked for these arches.
Strangely, suitesparseconfig was already keyworded ~hppa.
keyworded ~ppc ~ppc64, as with hppa, suitesparseconfig was already keyworded. I testted anyhow.
Alpha, too, had sci-libs/suitesparseconfig already keyworded. Tested and re-keyworded =sci-libs/umfpack-5.6.2 and -5.6.1-r1