wifi: cfg80211: separately store HT, VHT and HE capabilities for NAN

In NAN, unlike in other modes, there is only one set of (HT, VHT, HE)
capabilities that is used for all channels (and bands) used in the NAN
data path.

This set of capabilities will have to be a special one, for example - have
the minimum of (HT-for-5 GHz, HT-for-2.4 GHz), careful handling of the
bits that have a different meaning for each band, etc.

While we could use the exiting sband/iftype capabilities, and require
identical capabilities for all bands (makes no sense since this means
that we will have VHT capabilities in the 2.4 GHz slot),
or require that only one of the sbands will be set,
or have logic to extract the minimum and handle the conflicting bits -
it seems simpler to add a dedicated set of capabilities which is special
for NAN, and is band agnostic, to be populated by the driver.

That way we also let the driver decide how it wants to handle the
conflicting bits.

Add this special set of these capabilities to wiphy:nan_capabilities, to be
populated by the driver.
Send it to user space.

Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://patch.msgid.link/20260219114327.4b6f3e4a81b4.I45422adc0df3ad4101d857a92e83f0de5cf241e1@changeid
Link: https://patch.msgid.link/20260318123926.206536-5-miriam.rachel.korenblit@intel.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

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