radeonsi: fix regression on gpus using the radeon winsys.
For GPUs using the radeon kernel driver, num_se was never getting initialised.
Closes: #3939 (closed) Fixes: f2977a16 ("ac: fix min/max_good_num_cu_per_sa on gfx10.3 with disabled SEs")
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For GPUs using the radeon kernel driver, num_se was never getting initialised.
Closes: #3939 (closed) Fixes: f2977a16 ("ac: fix min/max_good_num_cu_per_sa on gfx10.3 with disabled SEs")