radv/gfx10: fix the ESGS ring size symbol

Random hangs no longer happen, I'm actually not sure if they were
related to this.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
40 jobs for !2020 with gfx10_fix_esgs_ring_size in 44 minutes and 55 seconds (queued for 8 seconds)
merge request