intel/fs: implement Wa_14017989577

The first instruction of any kernel should have non-zero emask. This
restriction needs to be obeyed to avoid GPU hangs.

Patch adds a function to insert dummy mov as first instruction
to make sure this requirement is fulfilled.

Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Cc: mesa-stable
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/20194>

src/intel/compiler/brw_fs.h

@@ -224,6 +224,7 @@ public:
    bool fixup_sends_duplicate_payload();
    void fixup_3src_null_dest();
    void emit_dummy_memory_fence_before_eot();
+   void emit_dummy_mov_instruction();
    bool fixup_nomask_control_flow();
    void assign_curb_setup();
    void assign_urb_setup();