tgsi: reduce tgsi_opcode_info::pre_dedent and post_indent to 1 bit

It's not clear why they were ever 2 bits to begin with. Perhaps
the original intent was to use signed values, but that doesn't
seem to have ever been the case in master.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
1 file changed