hostapd: recalc freq params
In case we could not change channel (eg. STA interface using different one) don't fail hostapd startup, simple recalc freq params.
Simplest patch for bw=80MHz. Tested with 11AC and ex400 - more tests required (11AX).
Signed-off-by: Janusz Dziedzic janusz.dziedzic@iopsys.eu