These settings solved the problem with hostap.
create_args_wlan0="wlanmode hostap mode 11g"
Works greate. But only mode 11g, not mode 11ng.
wlan0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
ether 00:06:4f:76:3d:7b
inet 192.168.33.1 netmask...