anv: Add and use emit_pipeline_select()

anv: Add and use emit_pipeline_select()

To avoid the replication of code to properly emit PIPELINE_SELECT.

init_compute_queue_state() had a different emit of PIPELINE_SELECT but
as there is no compute engine in GFX VER 11 we are safe with the
differences.

Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/20444>