swr: remove formats from mapping table that don't have StoreTile impls
swr: remove formats from mapping table that don't have StoreTile impls

This table exists for the purpose of determining renderable formats.
Without a StoreTile implementation, that can't happen.

This basically removes rendering support to all L/LA/I formats. They can
be re-added when/if StoreTile implementations are added.

Signed-off-by: Ilia Mirkin <bcbbb7aa705ec3a5fc5824c01a845186c3d62fca@alum.mit.edu>
Reviewed-by: Bruce Cherniak <a5345730962d952f474b19e983398300e1cb5f29@intel.com>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler