The hostapd configuration for SU-BEAMFORMEE was incorrectly using the
beamformer antenna count instead of the beamformee antenna count for the
[BF-ANTENNA-N] capability string.
Fix this by using config.beamformee_antennas instead.
Signed-off-by: Andrew Sim <andrewsimz@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/22511
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>