intel/fs/swsb: SCHEDULING_FENCE only emits SYNC_NOP

It's not really unordered in the sense that it can still stall on
ordered things and we don't need a SYNC_NOP for that because it is a
SYNC_NOP.  However, it also doesn't count when computing instruction
distances.

Fixes: 18e72ee2108 "intel/fs: Add FS_OPCODE_SCHEDULING_FENCE"
Reviewed-by: Francisco Jerez <currojerez@riseup.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6781>
1 file changed