iwlwifi: mvm: remove MAC_FILTER_IN_11AX for AP mode

The FW API was clarified saying that this flag should only be set in
BSS client mode.  Remove it from the MAC_CTXT command we send in AP
and GO modes.

Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Fixes: 3b5ee8dd

 ("iwlwifi: mvm: set MAC_FILTER_IN_11AX in AP mode")
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>