iface.switch_channel() only reports whether a CSA was started, not whether
it completed, so a config-driven channel switch that the driver never
finishes would leave the AP stuck without recovery. After issuing the CSA,
arm a timer and, if the switch has not completed by the deadline
(csa_in_progress still set), fall back to a full interface restart. The
timer is armed only on the config-initiated path, so ubus- and
apsta-triggered channel switches keep their own recovery.
Add an iface.csa_in_progress() ucode method wrapping hostapd_csa_in_progress().
Signed-off-by: Felix Fietkau <nbd@nbd.name>
c6d20bbf51