isl/formats: Integer formats are not filterable
isl/formats: Integer formats are not filterable

In ca2a8e56285, we updated the format table to add more formats (most of
which are new on SKL) but accidentally marked some integer formats as
filterable.  You can't filter an integer format.

Signed-off-by: Jason Ekstrand <68c46a606457643eab92053c1c05574abb26f861@jlekstrand.net>
Reviewed-by: Nanley Chery <d78cd5d33e98a5581566f188959f731bd0b1c0fd@intel.com>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler