intel/fs: Add an ex_desc field to fs_inst for SHADER_OPCODE_SEND
I meant to do this years ago when I first added SHADER_OPCODE_SEND. At the time, the only use for the extended descriptor was bindless handles which were always one thing and never non-constant. However, it doesn't actually require any extra instructions because we have to OR in ex_mlen
anyway.
Edited by Faith Ekstrand