radv: fix gang submissions with chaining

radv: fix gang submissions with chaining

Gang submissions are mostly only be used for task shaders to both
submit GFX and ACE command buffers in the same submission. Though,
the gang leader (the last submitted CS) IP type should match the
queue IP type to determine which fence to signal.

But if chaining is enabled, it's possible that all GFX cmdbufs are
chained to the first GFX cmdbuf, which means the last CS is ACE and
not GFX.

Fix this by resetting chaining for GFX when a cmdbuffer has GFX+ACE.

Cc: mesa-stable
Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/9724
Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/24966>