An extra control register word, tpu_tag_cdm_ctrl, will be present when
TPU_DM_GLOBAL_REGISTERS feature is present.
Emit it when it's needed.
The document of this register is available, however I don't think any of
the bits are needed to be set for our current feature set, so just emit
0 now.
Signed-off-by: Icenowy Zheng <uwu@icenowy.me>
Reviewed-by: Frank Binns <frank.binns@imgtec.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/30552>