Set correct tx_channel_width_set in config_bss

Based on IE IEEE80211_HT_CAP_SUP_WIDTH_20_40 configure
HW if bss supports 40MHz channel or not.

Signed-off-by: Eugene Krasnikov <k.eugene.e@gmail.com>
Do not send FEATURE_CAPS_EXCHANGE to old FW

Only latest FW supports smd command FEATURE_CAPS_EXCHANGE.
Do not send this command for old FW version.

Signed-off-by: Eugene Krasnikov <k.eugene.e@gmail.com>
Set correct listen_interval

listen_interval was hardcoded but must be set dynamically.

Signed-off-by: Eugene Krasnikov <k.eugene.e@gmail.com>