NIR_DEBUG=validate_ssa_dominance failed because dgc_cs_emit() weren't
actually in the if.
Fixes: 33a849e004 ("radv: emit indirect sets for indirect compute pipelines with DGC")
Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29782>