gluon-core: increase ath10k peer limit (#2607)

Increase the peer limit for ath10k-ct from 32 to 96 STAs like it is set
for the non-ct firmware / driver. In order to make this work with the
memory constraints of the wireless platform, reduce the number of
concurrent vdevs to the maximum Gluon uses (4).

Closes #2604

Signed-off-by: David Bauer <mail@david-bauer.net>

Signed-off-by: David Bauer <mail@david-bauer.net>