iwlwifi: mvm: correctly set channel flags

In case of forced passive scan on a UHB channel,
don't set the direct probe option for this channel.

Signed-off-by: Ayala Beker <ayala.beker@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20211219121514.0ede76a9ca92.Ie64a4df79ea9c485ae3d2fc043319e8f79cefa8e@changeid


Signed-off-by: Luca Coelho <luciano.coelho@intel.com>