tgsi: macro-ify the opcodes table

tgsi: macro-ify the opcodes table

So we can easily re-arrange members of tgsi_opcode_info, and readers of
the code don't have to guess what all the 0s mean.

Mostly done with regex search&replace.

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