he_spr_psr_enabled is appended to hostapd.conf if it's enabled, but hostapd
doesn't support this config, it should be used as an internal flag to control
the he_spr_sr_control configuring.
Signed-off-by: Lix Zhou <xeontz@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/18025
Signed-off-by: John Crispin <john@phrozen.org>