wifi: iwlwifi: mvm: decode USIG_B1_B7 RU to nl80211 RU width

This is based on 802.11be D1.5 table 9-53a

Signed-off-by: Mordechay Goodstein <mordechay.goodstein@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20230305124407.0b720d6d6a48.I0034dd108696223494799d3ffe4f09685800b831@changeid


Signed-off-by: Johannes Berg <johannes.berg@intel.com>