nv50: free memory allocated by the prog which reads MP perf counters

This fixes a memory leak introduced in 6a9c151
("nv50: add compute-related MP perf counters on G84+")

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
Cc: "11.1" <mesa-stable@lists.freedesktop.org>
1 file changed